0001487428 Horizon Technology Finance Corp false --12-31 Q3 2022 629,216 452,387 0 1,450 629,216 453,837 0.001 0.001 1,000,000 1,000,000 0 0 0 0 0.001 0.001 100,000,000 100,000,000 26,561,238 21,384,925 26,393,773 21,217,460 206.2 179.9 83.0 January 1, 2025 January 1, 2025 January 1, 2025 February 1, 2025 February 1, 2025 April 1, 2025 April 1, 2025 May 1, 2026 May 1, 2026 May 1, 2026 May 1, 2026 May 1, 2026 May 1, 2026 June 1, 2024 June 1, 2024 November 1, 2025 May 1, 2026 April 1, 2025 July 1, 2025 July 1, 2025 July 1, 2025 July 1, 2025 July 1, 2025 January 1, 2026 January 1, 2026 May 1, 2027 May 1, 2027 June 1, 2024 November 1, 2026 September 1, 2026 September 1, 2026 September 1, 2026 December 1, 2024 December 1, 2024 December 1, 2024 December 1, 2024 December 1, 2024 December 1, 2024 October 1, 2025 April 1, 2026 April 1, 2026 November 1, 2024 November 1, 2024 November 1, 2024 October 1, 2024 October 1, 2024 October 1, 2024 October 1, 2024 August 1, 2026 August 1, 2026 July 1, 2025 July 1, 2025 September 15, 2022 September 15, 2022 January 1, 2024 January 1, 2024 March 1, 2024 August 1, 2026 October 1, 2024 June 1, 2025 March 1, 2025 March 1, 2025 March 1, 2025 March 1, 2025 January 1, 2027 January 1, 2027 June 1, 2025 June 1, 2025 June 1, 2025 April 1, 2026 October 1, 2025 April 1, 2026 July 1, 2027 July 1, 2027 24.7 April 1, 2026 April 1, 2026 September 1, 2025 September 1, 2025 September 1, 2025 July 1, 2026 July 1, 2026 April 1, 2026 April 1, 2026 May 1, 2026 May 1, 2026 June 1, 2025 June 1, 2025 October 1, 2025 October 1, 2025 October 1, 2025 80.2 June 1, 2026 June 1, 2026 June 1, 2026 July 1, 2023 January 1, 2025 January 1, 2025 January 1, 2025 December 1, 2025 February 1, 2026 July 1, 2025 October 1, 2025 May 1, 2026 August 1, 2025 August 1, 2025 January 1, 2026 August 1, 2027 March 1, 2025 March 1, 2025 September 1, 2025 July 1, 2025 July 1, 2025 July 1, 2025 September 1, 2024 September 1, 2024 September 1, 2024 September 1, 2024 September 1, 2024 October 1, 2024 October 1, 2024 December 31, 2022 April 1, 2026 August 1, 2026 July 1, 2027 July 1, 2027 April 1, 2026 April 1, 2026 April 1, 2026 April 1, 2026 March 1, 2026 March 1, 2026 July 1, 2025 August 1, 2025 August 1, 2026 August 1, 2026 August 1, 2026 August 1, 2026 February 1, 2025 February 1, 2025 December 1, 2025 December 1, 2025 10.0 June 1, 2026 June 1, 2026 June 1, 2026 October 1, 2025 December 31, 2025 August 1, 2027 August 1, 2027 August 1, 2027 7.2 1.8 0.5 4.2 0.6 0.4 0.7 206.3 2.5 0.5 186.7 178.3 77.3 March 1, 2024 March 1, 2024 March 1, 2024 March 1, 2024 January 1, 2025 January 1, 2025 January 1, 2025 February 1, 2025 February 1, 2025 April 1, 2025 April 1, 2025 June 1, 2024 June 1, 2024 November 1, 2025 April 1, 2025 July 1, 2025 July 1, 2025 July 1, 2025 July 1, 2025 July 1, 2025 June 1, 2024 December 1, 2024 December 1, 2024 December 1, 2024 December 1, 2024 December 1, 2024 December 1, 2024 October 1, 2025 October 1, 2025 November 1, 2024 October 1, 2024 October 1, 2024 October 1, 2024 October 1, 2024 July 1, 2025 July 1, 2025 April 1, 2022 April 1, 2022 January 1, 2024 January 1, 2024 March 1, 2024 August 1, 2026 October 1, 2024 June 1, 2025 September 1, 2023 September 1, 2023 March 1, 2025 March 1, 2025 March 1, 2025 March 1, 2025 June 1, 2024 June 1, 2024 June 1, 2024 18.8 January 1, 2025 September 1, 2025 September 1, 2025 September 1, 2025 June 1, 2025 June 1, 2025 October 1, 2025 October 1, 2025 October 1, 2025 77.2 June 1, 2026 June 1, 2026 June 1, 2026 July 1, 2023 January 1, 2025 January 1, 2025 January 1, 2025 December 1, 2025 July 1, 2025 May 1, 2026 August 1, 2025 August 1, 2025 January 1, 2026 January 1, 2026 January 1, 2024 January 1, 2026 January 1, 2026 March 1, 2025 March 1, 2025 September 1, 2025 April 1, 2026 July 1, 2025 July 1, 2025 December 20, 2024 December 20, 2024 December 20, 2024 September 1, 2024 September 1, 2024 September 1, 2024 September 1, 2024 September 1, 2024 September 1, 2026 November 1, 2026 July 1, 2023 October 1, 2024 October 1, 2024 January 1, 2023 April 1, 2026 April 1, 2026 October 1, 2025 October 1, 2025 October 1, 2025 July 1, 2025 August 1, 2025 February 1, 2025 February 1, 2025 December 1, 2025 5.0 January 1, 2025 January 1, 2025 January 1, 2026 8.2 1.0 0.4 6.2 0.6 0.1 0.1 0.0 0.0 186.7 3.2 0.6 5.8 0 0 0 0 0 2021 2020 2019 0 0 0 0 November 17, 2022 December 15, 2022 October 18, 2022 November 15, 2022 September 19, 2022 October 14, 2022 August 18, 2022 September 15, 2022 July 19, 2022 August 16, 2022 June 17, 2022 July 15, 2022 May 18, 2022 June 15, 2022 April 19, 2022 May 16, 2022 March 18, 2022 April 14, 2022 February 18, 2022 March 16, 2022 January 19, 2022 February 16, 2022 December 17, 2021 January 14, 2022 November 18, 2021 December 15, 2021 November 18, 2021 December 15, 2021 October 19, 2021 November 16, 2021 September 17, 2021 October 15, 2021 August 18, 2021 September 15, 2021 July 20, 2021 August 16, 2021 June 17, 2021 July 16, 2021 May 18, 2021 June 16, 2021 April 20, 2021 May 14, 2021 March 18, 2021 April 16, 2021 Annualized. Distributions are determined based on taxable income calculated in accordance with income tax regulations, which may differ from amounts determined under GAAP due to (i) changes in unrealized appreciation and depreciation, (ii) temporary and permanent differences in income and expense recognition, and (iii) the amount of spillover income carried over from a given tax year for distribution in the following tax year. The final determination of taxable income for each tax year, as well as the tax attributes for distributions in such tax year, will be made after the close of the tax year. The total return equals the change in the ending market value over the beginning of period price per share plus distributions paid per share during the period, divided by the beginning price. As of December 31, 2021, the Company no longer owns 5% or more of the portfolio company. Calculated by dividing the lesser of purchases or the sum of (1) principal prepayments and (2) maturities by the monthly average debt investment balance. Includes the impact of the different share amounts as a result of calculating per share data based on the weighted average basic shares outstanding during the period and certain per share data based on the shares outstanding as of a period end or transaction date. The issuance of common stock on a per share basis reflects the incremental net asset value changes as a result of the issuance of common stock in the Company’s continuous public offering and pursuant to the Company’s distribution reinvestment plan. The issuance of common stock at an offering price, net of sales commissions and dealer manager fees, that is greater than the net asset value per share results in an increase in net asset value per share. 00014874282022-01-012022-09-30 xbrli:shares 00014874282022-11-01 0001487428us-gaap:CommonStockMember2022-01-012022-09-30 0001487428hrzn:The4875NotesDue2026Member2022-01-012022-09-30 0001487428hrzn:The625NotesDue2027Member2022-01-012022-09-30 thunderdome:item iso4217:USD 0001487428hrzn:NonaffiliateMember2022-09-30 0001487428hrzn:NonaffiliateMember2021-12-31 0001487428hrzn:AffiliateMember2022-09-30 0001487428hrzn:AffiliateMember2021-12-31 00014874282022-09-30 00014874282021-12-31 iso4217:USDxbrli:shares 0001487428hrzn:NonaffiliateMember2022-07-012022-09-30 0001487428hrzn:NonaffiliateMember2021-07-012021-09-30 0001487428hrzn:NonaffiliateMember2022-01-012022-09-30 0001487428hrzn:NonaffiliateMember2021-01-012021-09-30 0001487428hrzn:AffiliateMember2022-07-012022-09-30 0001487428hrzn:AffiliateMember2021-07-012021-09-30 0001487428hrzn:AffiliateMember2022-01-012022-09-30 0001487428hrzn:AffiliateMember2021-01-012021-09-30 00014874282022-07-012022-09-30 00014874282021-07-012021-09-30 00014874282021-01-012021-09-30 0001487428hrzn:NoncontrolledAffiliateMember2022-07-012022-09-30 0001487428hrzn:NoncontrolledAffiliateMember2021-07-012021-09-30 0001487428hrzn:NoncontrolledAffiliateMember2022-01-012022-09-30 0001487428hrzn:NoncontrolledAffiliateMember2021-01-012021-09-30 0001487428hrzn:ControlledAffiliateMember2022-07-012022-09-30 0001487428hrzn:ControlledAffiliateMember2021-07-012021-09-30 0001487428hrzn:ControlledAffiliateMember2022-01-012022-09-30 0001487428hrzn:ControlledAffiliateMember2021-01-012021-09-30 0001487428hrzn:CommonStockOutstandingMember2021-06-30 0001487428us-gaap:CommonStockMember2021-06-30 0001487428us-gaap:AdditionalPaidInCapitalMember2021-06-30 0001487428us-gaap:RetainedEarningsMember2021-06-30 00014874282021-06-30 0001487428hrzn:CommonStockOutstandingMember2021-07-012021-09-30 0001487428us-gaap:CommonStockMember2021-07-012021-09-30 0001487428us-gaap:AdditionalPaidInCapitalMember2021-07-012021-09-30 0001487428us-gaap:RetainedEarningsMember2021-07-012021-09-30 0001487428hrzn:CommonStockOutstandingMember2021-09-30 0001487428us-gaap:CommonStockMember2021-09-30 0001487428us-gaap:AdditionalPaidInCapitalMember2021-09-30 0001487428us-gaap:RetainedEarningsMember2021-09-30 00014874282021-09-30 0001487428hrzn:CommonStockOutstandingMember2022-06-30 0001487428us-gaap:CommonStockMember2022-06-30 0001487428us-gaap:AdditionalPaidInCapitalMember2022-06-30 0001487428us-gaap:RetainedEarningsMember2022-06-30 00014874282022-06-30 0001487428hrzn:CommonStockOutstandingMember2022-07-012022-09-30 0001487428us-gaap:CommonStockMember2022-07-012022-09-30 0001487428us-gaap:AdditionalPaidInCapitalMember2022-07-012022-09-30 0001487428us-gaap:RetainedEarningsMember2022-07-012022-09-30 0001487428hrzn:CommonStockOutstandingMember2022-09-30 0001487428us-gaap:CommonStockMember2022-09-30 0001487428us-gaap:AdditionalPaidInCapitalMember2022-09-30 0001487428us-gaap:RetainedEarningsMember2022-09-30 0001487428hrzn:CommonStockOutstandingMember2020-12-31 0001487428us-gaap:CommonStockMember2020-12-31 0001487428us-gaap:AdditionalPaidInCapitalMember2020-12-31 0001487428us-gaap:RetainedEarningsMember2020-12-31 00014874282020-12-31 0001487428hrzn:CommonStockOutstandingMember2021-01-012021-09-30 0001487428us-gaap:CommonStockMember2021-01-012021-09-30 0001487428us-gaap:AdditionalPaidInCapitalMember2021-01-012021-09-30 0001487428us-gaap:RetainedEarningsMember2021-01-012021-09-30 0001487428hrzn:CommonStockOutstandingMember2021-12-31 0001487428us-gaap:CommonStockMember2021-12-31 0001487428us-gaap:AdditionalPaidInCapitalMember2021-12-31 0001487428us-gaap:RetainedEarningsMember2021-12-31 0001487428hrzn:CommonStockOutstandingMember2022-01-012022-09-30 0001487428us-gaap:CommonStockMember2022-01-012022-09-30 0001487428us-gaap:AdditionalPaidInCapitalMember2022-01-012022-09-30 0001487428us-gaap:RetainedEarningsMember2022-01-012022-09-30 0001487428hrzn:The2027NotesMember2022-01-012022-09-30 0001487428hrzn:The2027NotesMember2021-01-012021-09-30 0001487428hrzn:The2026NotesMember2022-01-012022-09-30 0001487428hrzn:The2026NotesMember2021-01-012021-09-30 0001487428hrzn:AssetbackedNotesMember2022-01-012022-09-30 0001487428hrzn:AssetbackedNotesMember2021-01-012021-09-30 0001487428hrzn:The2022NotesMember2022-01-012022-09-30 0001487428hrzn:The2022NotesMember2021-01-012021-09-30 xbrli:pure 0001487428hrzn:NonaffiliateMember2022-09-30 0001487428hrzn:NonaffiliateMemberhrzn:DebtInvestmentsMember2022-09-30 0001487428hrzn:NonaffiliateMemberhrzn:LifeScienceSegmentMemberhrzn:DebtInvestmentsMember2022-09-30 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1250CashPrime625Floor95030EtpDue1125OneMember2022-09-30 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1250CashPrime625Floor95030EtpDue1125OneMember2022-01-012022-09-30 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1100CashPrime625Floor95030EtpDue1125TwoMember2022-09-30 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1100CashPrime625Floor95030EtpDue1125TwoMember2022-01-012022-09-30 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1250CashPrime625Floor95030EtpDue1125ThreeMember2022-09-30 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1250CashPrime625Floor95030EtpDue1125ThreeMember2022-01-012022-09-30 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1250CashPrime625Floor95030EtpDue2125OneMember2022-09-30 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1250CashPrime625Floor95030EtpDue2125TwoMember2022-09-30 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1250CashPrime625Floor95030EtpDue2125TwoMember2022-01-012022-09-30 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1250CashPrime625Floor95030EtpDue4125OneMember2022-09-30 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1250CashPrime625Floor95030EtpDue4125OneMember2022-01-012022-09-30 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1250CashPrime625Floor95030EtpDue4125TwoMember2022-09-30 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1250CashPrime625Floor95030EtpDue4125TwoMember2022-01-012022-09-30 0001487428hrzn:CastleCreekBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1155CashPrime605Floor955550EtpDue5126OneMember2022-09-30 0001487428hrzn:CastleCreekBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1155CashPrime605Floor955550EtpDue5126OneMember2022-01-012022-09-30 0001487428hrzn:CastleCreekBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1155CashPrime605Floor955550EtpDue5126TwoMember2022-09-30 0001487428hrzn:CastleCreekBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1155CashPrime605Floor955550EtpDue5126TwoMember2022-01-012022-09-30 0001487428hrzn:CastleCreekBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1155CashPrime605Floor955550EtpDue5126ThreeMember2022-09-30 0001487428hrzn:CastleCreekBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1155CashPrime605Floor955550EtpDue5126ThreeMember2022-01-012022-09-30 0001487428hrzn:CastleCreekBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1155CashPrime605Floor955550EtpDue5126FourMember2022-09-30 0001487428hrzn:CastleCreekBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1155CashPrime605Floor955550EtpDue5126FourMember2022-01-012022-09-30 0001487428hrzn:CastleCreekBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1155CashPrime605Floor955550EtpDue5126FiveMember2022-09-30 0001487428hrzn:CastleCreekBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1155CashPrime605Floor955550EtpDue5126FiveMember2022-01-012022-09-30 0001487428hrzn:CastleCreekBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1155CashPrime605Floor955550EtpDue5126SixMember2022-09-30 0001487428hrzn:CastleCreekBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1155CashPrime605Floor955550EtpDue5126SixMember2022-01-012022-09-30 0001487428hrzn:EmalexBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1045CashLibor790Floor975500EtpDue6124OneMember2022-09-30 0001487428hrzn:EmalexBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1045CashLibor790Floor975500EtpDue6124OneMember2022-01-012022-09-30 0001487428hrzn:EmalexBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1045CashLibor790Floor975500EtpDue6124TwoMember2022-09-30 0001487428hrzn:EmalexBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1045CashLibor790Floor975500EtpDue6124TwoMember2022-01-012022-09-30 0001487428hrzn:EmalexBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1045CashLibor790Floor975500EtpDue11125Member2022-09-30 0001487428hrzn:EmalexBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1045CashLibor790Floor975500EtpDue11125Member2022-01-012022-09-30 0001487428hrzn:EmalexBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1045CashLibor790Floor975500EtpDue5126Member2022-09-30 0001487428hrzn:EmalexBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1045CashLibor790Floor975500EtpDue5126Member2022-01-012022-09-30 0001487428hrzn:FstarTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue4125Member2022-09-30 0001487428hrzn:FstarTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue4125Member2022-01-012022-09-30 0001487428hrzn:FstarTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue7125Member2022-09-30 0001487428hrzn:FstarTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue7125Member2022-01-012022-09-30 0001487428hrzn:GreenlightBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1200CashPrime575Floor900300EtpDue7125OneMember2022-09-30 0001487428hrzn:GreenlightBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1200CashPrime575Floor900300EtpDue7125OneMember2022-01-012022-09-30 0001487428hrzn:GreenlightBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1200CashPrime575Floor900300EtpDue7125TwoMember2022-09-30 0001487428hrzn:GreenlightBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1200CashPrime575Floor900300EtpDue7125TwoMember2022-01-012022-09-30 0001487428hrzn:ImvIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1200CashPrime575Floor900500EtpDue7125OneMember2022-09-30 0001487428hrzn:ImvIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1200CashPrime575Floor900500EtpDue7125OneMember2022-01-012022-09-30 0001487428hrzn:ImvIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1200CashPrime575Floor900500EtpDue7125TwoMember2022-09-30 0001487428hrzn:ImvIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1200CashPrime575Floor900500EtpDue7125TwoMember2022-01-012022-09-30 0001487428hrzn:ImvIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1200CashPrime575Floor900500EtpDue1126OneMember2022-09-30 0001487428hrzn:ImvIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1200CashPrime575Floor900500EtpDue1126OneMember2022-01-012022-09-30 0001487428hrzn:ImvIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1200CashPrime575Floor900500EtpDue1126TwoMember2022-09-30 0001487428hrzn:ImvIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1200CashPrime575Floor900500EtpDue1126TwoMember2022-01-012022-09-30 0001487428hrzn:KSQTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1100CashPrime475Floor850550EtpDue5127OneMember2022-09-30 0001487428hrzn:KSQTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1100CashPrime475Floor850550EtpDue5127OneMember2022-01-012022-09-30 0001487428hrzn:KSQTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1100CashPrime475Floor850550EtpDue5127TwoMember2022-09-30 0001487428hrzn:KSQTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1100CashPrime475Floor850550EtpDue5127TwoMember2022-01-012022-09-30 0001487428hrzn:LogicbioIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan880CashLibor625Floor875450EtpDue6124Member2022-09-30 0001487428hrzn:LogicbioIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan880CashLibor625Floor875450EtpDue6124Member2022-01-012022-09-30 0001487428hrzn:NativeMicrobialsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1150CashPrime525Floor850500EtpDue11126Member2022-09-30 0001487428hrzn:NativeMicrobialsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1150CashPrime525Floor850500EtpDue11126Member2022-01-012022-09-30 0001487428hrzn:PdsBiotechnologyCorporationMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1200CashPrime575Floor975375EtpDue9126OneMember2022-09-30 0001487428hrzn:PdsBiotechnologyCorporationMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1200CashPrime575Floor975375EtpDue9126OneMember2022-01-012022-09-30 0001487428hrzn:PdsBiotechnologyCorporationMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1200CashPrime575Floor975375EtpDue9126TwoMember2022-09-30 0001487428hrzn:PdsBiotechnologyCorporationMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1200CashPrime575Floor975375EtpDue9126TwoMember2022-01-012022-09-30 0001487428hrzn:PdsBiotechnologyCorporationMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1200CashPrime575Floor975375EtpDue9126ThreeMember2022-09-30 0001487428hrzn:PdsBiotechnologyCorporationMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1200CashPrime575Floor975375EtpDue9126ThreeMember2022-01-012022-09-30 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1105CashLibor850Floor950550EtpDue12124OneMember2022-09-30 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1105CashLibor850Floor950550EtpDue12124OneMember2022-01-012022-09-30 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1105CashLibor850Floor950550EtpDue12124TwoMember2022-09-30 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1105CashLibor850Floor950550EtpDue12124TwoMember2022-01-012022-09-30 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1105CashLibor850Floor950550EtpDue12124ThreeMember2022-09-30 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1105CashLibor850Floor950550EtpDue12124ThreeMember2022-01-012022-09-30 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1105CashLibor850Floor950550EtpDue12124FourMember2022-09-30 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1105CashLibor850Floor950550EtpDue12124FourMember2022-01-012022-09-30 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1105CashLibor850Floor950550EtpDue12124FiveMember2022-09-30 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1105CashLibor850Floor950550EtpDue12124FiveMember2022-01-012022-09-30 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1105CashLibor850Floor950550EtpDue12124SixMember2022-09-30 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1105CashLibor850Floor950550EtpDue12124SixMember2022-01-012022-09-30 0001487428hrzn:StealthBioTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1175CashPrime550Floor87560EtpDue10125OneMember2022-09-30 0001487428hrzn:StealthBioTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1175CashPrime550Floor87560EtpDue10125OneMember2022-01-012022-09-30 0001487428hrzn:StealthBioTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1025CashPrime550Floor87560EtpDue10125TwoMember2022-09-30 0001487428hrzn:StealthBioTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan1025CashPrime550Floor87560EtpDue10125TwoMember2022-01-012022-09-30 0001487428hrzn:AerobiotixLlcMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1250CashPrime625Floor95060EtpDue4126OneMember2022-09-30 0001487428hrzn:AerobiotixLlcMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1250CashPrime625Floor95060EtpDue4126OneMember2022-01-012022-09-30 0001487428hrzn:AerobiotixLlcMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1250CashPrime625Floor95060EtpDue4126TwoMember2022-09-30 0001487428hrzn:AerobiotixLlcMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1250CashPrime625Floor95060EtpDue4126TwoMember2022-01-012022-09-30 0001487428hrzn:CanaryMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1125CashPrime575Floor900700EtpDue11124OneMember2022-09-30 0001487428hrzn:CanaryMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1125CashPrime575Floor900700EtpDue11124OneMember2022-01-012022-09-30 0001487428hrzn:CanaryMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1125CashPrime575Floor900700EtpDue11124TwoMember2022-09-30 0001487428hrzn:CanaryMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1125CashPrime575Floor900700EtpDue11124TwoMember2022-01-012022-09-30 0001487428hrzn:CanaryMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1125CashPrime575Floor900700EtpDue11124ThreeMember2022-09-30 0001487428hrzn:CanaryMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1125CashPrime575Floor900700EtpDue11124ThreeMember2022-01-012022-09-30 0001487428hrzn:CeribellIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan900CashPrime375Floor825550EtpDue10124OneMember2022-09-30 0001487428hrzn:CeribellIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan900CashPrime375Floor825550EtpDue10124OneMember2022-01-012022-09-30 0001487428hrzn:CeribellIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan900CashPrime375Floor825550EtpDue10124TwoMember2022-09-30 0001487428hrzn:CeribellIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan900CashPrime375Floor825550EtpDue10124TwoMember2022-01-012022-09-30 0001487428hrzn:CeribellIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan900CashPrime375Floor825550EtpDue10124ThreeMember2022-09-30 0001487428hrzn:CeribellIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan900CashPrime375Floor825550EtpDue10124ThreeMember2022-01-012022-09-30 0001487428hrzn:CeribellIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan900CashPrime375Floor825550EtpDue10124FourMember2022-09-30 0001487428hrzn:CeribellIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan900CashPrime375Floor825550EtpDue10124FourMember2022-01-012022-09-30 0001487428hrzn:CognoaIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1175CashPrime550Floor87560EtpDue8126OneMember2022-09-30 0001487428hrzn:CognoaIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1175CashPrime550Floor87560EtpDue8126OneMember2022-01-012022-09-30 0001487428hrzn:CognoaIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1175CashPrime550Floor87560EtpDue8126TwoMember2022-09-30 0001487428hrzn:CognoaIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1175CashPrime550Floor87560EtpDue8126TwoMember2022-01-012022-09-30 0001487428hrzn:ConventusOrthopaedicsIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1055CashLibor800Floor9251036EtpDue7125OneMember2022-09-30 0001487428hrzn:ConventusOrthopaedicsIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1055CashLibor800Floor9251036EtpDue7125OneMember2022-01-012022-09-30 0001487428hrzn:ConventusOrthopaedicsIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1055CashLibor800Floor9251036EtpDue7125TwoMember2022-09-30 0001487428hrzn:ConventusOrthopaedicsIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1055CashLibor800Floor9251036EtpDue7125TwoMember2022-01-012022-09-30 0001487428hrzn:CorinthMedtechIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1075CashPrime525Floor8502000EtpDue91522OneMember2022-09-30 0001487428hrzn:CorinthMedtechIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1075CashPrime525Floor8502000EtpDue91522OneMember2022-01-012022-09-30 0001487428hrzn:CorinthMedtechIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1075CashPrime525Floor8502000EtpDue91522TwoMember2022-09-30 0001487428hrzn:CorinthMedtechIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1075CashPrime525Floor8502000EtpDue91522TwoMember2022-01-012022-09-30 0001487428hrzn:CsaMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1075CashLibor820Floor1000500EtpDue1124OneMember2022-09-30 0001487428hrzn:CsaMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1075CashLibor820Floor1000500EtpDue1124OneMember2022-01-012022-09-30 0001487428hrzn:CsaMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1075CashLibor820Floor1000500EtpDue1124TwoMember2022-09-30 0001487428hrzn:CsaMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1075CashLibor820Floor1000500EtpDue1124TwoMember2022-01-012022-09-30 0001487428hrzn:CsaMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1075CashLibor820Floor1000500EtpDue3124Member2022-09-30 0001487428hrzn:CsaMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1075CashLibor820Floor1000500EtpDue3124Member2022-01-012022-09-30 0001487428hrzn:EmbodyIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1275CashPrime650Floor9752800EtpDue8126Member2022-09-30 0001487428hrzn:EmbodyIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1275CashPrime650Floor9752800EtpDue8126Member2022-01-012022-09-30 0001487428hrzn:InfobionicIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue10124Member2022-09-30 0001487428hrzn:InfobionicIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue10124Member2022-01-012022-09-30 0001487428hrzn:InfobionicIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue6125Member2022-09-30 0001487428hrzn:InfobionicIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue6125Member2022-01-012022-09-30 0001487428hrzn:MagnoliaMedicalTechnologiesIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1050CashPrime500Floor975400EtpDue3125OneMember2022-09-30 0001487428hrzn:MagnoliaMedicalTechnologiesIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1050CashPrime500Floor975400EtpDue3125OneMember2022-01-012022-09-30 0001487428hrzn:MagnoliaMedicalTechnologiesIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1050CashPrime500Floor975400EtpDue3125TwoMember2022-09-30 0001487428hrzn:MagnoliaMedicalTechnologiesIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1050CashPrime500Floor975400EtpDue3125TwoMember2022-01-012022-09-30 0001487428hrzn:MagnoliaMedicalTechnologiesIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1050CashPrime500Floor975400EtpDue3125ThreeMember2022-09-30 0001487428hrzn:MagnoliaMedicalTechnologiesIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1050CashPrime500Floor975400EtpDue3125ThreeMember2022-01-012022-09-30 0001487428hrzn:MagnoliaMedicalTechnologiesIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1050CashPrime500Floor975400EtpDue3125FourMember2022-09-30 0001487428hrzn:MagnoliaMedicalTechnologiesIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1050CashPrime500Floor975400EtpDue3125FourMember2022-01-012022-09-30 0001487428hrzn:ScientiaVascularIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1025CashPrime475Floor850500EtpDue1127OneMember2022-09-30 0001487428hrzn:ScientiaVascularIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1025CashPrime475Floor850500EtpDue1127OneMember2022-01-012022-09-30 0001487428hrzn:ScientiaVascularIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1025CashPrime475Floor850500EtpDue1127TwoMember2022-09-30 0001487428hrzn:ScientiaVascularIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1025CashPrime475Floor850500EtpDue1127TwoMember2022-01-012022-09-30 0001487428hrzn:SonexHealthIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1200CashPrime650Floor975500EtpDue6125OneMember2022-09-30 0001487428hrzn:SonexHealthIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1200CashPrime650Floor975500EtpDue6125OneMember2022-01-012022-09-30 0001487428hrzn:SonexHealthIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1200CashPrime650Floor975500EtpDue6125TwoMember2022-09-30 0001487428hrzn:SonexHealthIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1200CashPrime650Floor975500EtpDue6125TwoMember2022-01-012022-09-30 0001487428hrzn:SonexHealthIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1200CashPrime650Floor975500EtpDue6125ThreeMember2022-09-30 0001487428hrzn:SonexHealthIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1200CashPrime650Floor975500EtpDue6125ThreeMember2022-01-012022-09-30 0001487428hrzn:SonexHealthIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1200CashPrime650Floor975800EtpDue4126Member2022-09-30 0001487428hrzn:SonexHealthIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1200CashPrime650Floor975800EtpDue4126Member2022-01-012022-09-30 0001487428hrzn:SpineologyIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1325CashPrime700Floor1025100EtpDue10125Member2022-09-30 0001487428hrzn:SpineologyIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1325CashPrime700Floor1025100EtpDue10125Member2022-01-012022-09-30 0001487428hrzn:SpineologyIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1325CashPrime700Floor1025100EtpDue4126Member2022-09-30 0001487428hrzn:SpineologyIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1325CashPrime700Floor1025100EtpDue4126Member2022-01-012022-09-30 0001487428hrzn:SwiftHealthSystemsIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1075CashPrime525Floor900500EtpDue7127OneMember2022-09-30 0001487428hrzn:SwiftHealthSystemsIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1075CashPrime525Floor900500EtpDue7127OneMember2022-01-012022-09-30 0001487428hrzn:SwiftHealthSystemsIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1000CashPrime525Floor900500EtpDue7127TwoMember2022-09-30 0001487428hrzn:SwiftHealthSystemsIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1000CashPrime525Floor900500EtpDue7127TwoMember2022-01-012022-09-30 0001487428hrzn:NonaffiliateMemberhrzn:LifeScienceMemberus-gaap:DebtSecuritiesMember2022-09-30 0001487428hrzn:NonaffiliateMemberhrzn:SustainabilitySegmentMemberhrzn:DebtInvestmentsMember2022-09-30 0001487428hrzn:DreamHoldingsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000300EtpDue4126OneMember2022-09-30 0001487428hrzn:DreamHoldingsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000300EtpDue4126OneMember2022-01-012022-09-30 0001487428hrzn:DreamHoldingsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000300EtpDue4126TwoMember2022-09-30 0001487428hrzn:DreamHoldingsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000300EtpDue4126TwoMember2022-01-012022-09-30 0001487428hrzn:NexiiBuildingSolutionsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1325CashPrime700Floor1025250EtpDue9125OneMember2022-09-30 0001487428hrzn:NexiiBuildingSolutionsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1325CashPrime700Floor1025250EtpDue9125OneMember2022-01-012022-09-30 0001487428hrzn:NexiiBuildingSolutionsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1325CashPrime700Floor1025250EtpDue9125TwoMember2022-09-30 0001487428hrzn:NexiiBuildingSolutionsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1325CashPrime700Floor1025250EtpDue9125TwoMember2022-01-012022-09-30 0001487428hrzn:NexiiBuildingSolutionsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1325CashPrime700Floor1025250EtpDue9125ThreeMember2022-09-30 0001487428hrzn:NexiiBuildingSolutionsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1325CashPrime700Floor1025250EtpDue9125ThreeMember2022-01-012022-09-30 0001487428hrzn:NexiiBuildingSolutionsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1325CashPrime700Floor1025250EtpDue7126OneMember2022-09-30 0001487428hrzn:NexiiBuildingSolutionsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1325CashPrime700Floor1025250EtpDue7126OneMember2022-01-012022-09-30 0001487428hrzn:NexiiBuildingSolutionsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1325CashPrime700Floor1025250EtpDue7126TwoMember2022-09-30 0001487428hrzn:NexiiBuildingSolutionsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1325CashPrime700Floor1025250EtpDue7126TwoMember2022-01-012022-09-30 0001487428hrzn:SoliOrganicIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000275EtpDue4126OneMember2022-09-30 0001487428hrzn:SoliOrganicIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000275EtpDue4126OneMember2022-01-012022-09-30 0001487428hrzn:SoliOrganicIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000275EtpDue4126TwoMember2022-09-30 0001487428hrzn:SoliOrganicIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000275EtpDue4126TwoMember2022-01-012022-09-30 0001487428hrzn:SoliOrganicIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000275EtpDue5126OneMember2022-09-30 0001487428hrzn:SoliOrganicIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000275EtpDue5126OneMember2022-01-012022-09-30 0001487428hrzn:SoliOrganicIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000275EtpDue5126TwoMember2022-09-30 0001487428hrzn:SoliOrganicIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000275EtpDue5126TwoMember2022-01-012022-09-30 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000250EtpDue6125OneMember2022-09-30 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000250EtpDue6125OneMember2022-01-012022-09-30 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000250EtpDue6125TwoMember2022-09-30 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000250EtpDue6125TwoMember2022-01-012022-09-30 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000250EtpDue10125OneMember2022-09-30 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000250EtpDue10125OneMember2022-01-012022-09-30 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000250EtpDue10125TwoMember2022-09-30 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000250EtpDue10125TwoMember2022-01-012022-09-30 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000250EtpDue10125ThreeMember2022-09-30 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1300CashPrime675Floor1000250EtpDue10125ThreeMember2022-01-012022-09-30 0001487428hrzn:NonaffiliateMemberhrzn:OtherSustainabilitySectorMemberus-gaap:DebtSecuritiesMember2022-09-30 0001487428hrzn:NonaffiliateMemberhrzn:TechnologySegmentMemberhrzn:DebtInvestmentsMember2022-09-30 0001487428hrzn:AxiomSpaceIncMemberhrzn:CommunicationsSectorMemberhrzn:TermLoan1150CashPrime600Floor925250EtpDue6126OneMember2022-09-30 0001487428hrzn:AxiomSpaceIncMemberhrzn:CommunicationsSectorMemberhrzn:TermLoan1150CashPrime600Floor925250EtpDue6126OneMember2022-01-012022-09-30 0001487428hrzn:AxiomSpaceIncMemberhrzn:CommunicationsSectorMemberhrzn:TermLoan1150CashPrime600Floor925250EtpDue6126TwoMember2022-09-30 0001487428hrzn:AxiomSpaceIncMemberhrzn:CommunicationsSectorMemberhrzn:TermLoan1150CashPrime600Floor925250EtpDue6126TwoMember2022-01-012022-09-30 0001487428hrzn:AxiomSpaceIncMemberhrzn:CommunicationsSectorMemberhrzn:TermLoan1150CashPrime600Floor925250EtpDue6126ThreeMember2022-09-30 0001487428hrzn:AxiomSpaceIncMemberhrzn:CommunicationsSectorMemberhrzn:TermLoan1150CashPrime600Floor925250EtpDue6126ThreeMember2022-01-012022-09-30 0001487428hrzn:AxiomSpaceIncMemberhrzn:CommunicationsSectorMemberhrzn:ConvertibleNote300Due7123Member2022-09-30 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1225CashPrime675Floor1000300EtpDue1125OneMember2022-09-30 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1225CashPrime675Floor1000300EtpDue1125OneMember2022-01-012022-09-30 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1225CashPrime675Floor1000300EtpDue1125TwoMember2022-09-30 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1225CashPrime675Floor1000300EtpDue1125TwoMember2022-01-012022-09-30 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1225CashPrime675Floor1000300EtpDue1125ThreeMember2022-09-30 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1225CashPrime675Floor1000300EtpDue1125ThreeMember2022-01-012022-09-30 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1225CashPrime675Floor1000300EtpDue12125Member2022-09-30 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1225CashPrime675Floor1000300EtpDue12125Member2022-01-012022-09-30 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1225CashPrime675Floor1000300EtpDue2126Member2022-09-30 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1225CashPrime675Floor1000300EtpDue2126Member2022-01-012022-09-30 0001487428hrzn:BetterPlaceForestsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1250CashPrime625Floor950185EtpDue7125Member2022-09-30 0001487428hrzn:BetterPlaceForestsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1250CashPrime625Floor950185EtpDue7125Member2022-01-012022-09-30 0001487428hrzn:BetterPlaceForestsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1250CashPrime625Floor950185EtpDue10125Member2022-09-30 0001487428hrzn:BetterPlaceForestsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1250CashPrime625Floor950185EtpDue10125Member2022-01-012022-09-30 0001487428hrzn:CampNycIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1350CashPrime725Floor1050300EtpDue5126Member2022-09-30 0001487428hrzn:CampNycIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1350CashPrime725Floor1050300EtpDue5126Member2022-01-012022-09-30 0001487428hrzn:ClaraFoodsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900550EtpDue8125OneMember2022-09-30 0001487428hrzn:ClaraFoodsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900550EtpDue8125OneMember2022-01-012022-09-30 0001487428hrzn:ClaraFoodsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900550EtpDue8125TwoMember2022-09-30 0001487428hrzn:ClaraFoodsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900550EtpDue8125TwoMember2022-01-012022-09-30 0001487428hrzn:DivergentTechnologiesIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime600Floor950300EtpDue7127OneMember2022-09-30 0001487428hrzn:DivergentTechnologiesIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime600Floor950300EtpDue7127OneMember2022-01-012022-09-30 0001487428hrzn:DivergentTechnologiesIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime600Floor950300EtpDue7127TwoMember2022-09-30 0001487428hrzn:DivergentTechnologiesIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime600Floor950300EtpDue7127TwoMember2022-01-012022-09-30 0001487428hrzn:DivergentTechnologiesIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime600Floor950300EtpDue7127ThreeMember2022-09-30 0001487428hrzn:DivergentTechnologiesIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime600Floor950300EtpDue7127ThreeMember2022-01-012022-09-30 0001487428hrzn:DivergentTechnologiesIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime600Floor950300EtpDue7127FourMember2022-09-30 0001487428hrzn:DivergentTechnologiesIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime600Floor950300EtpDue7127FourMember2022-01-012022-09-30 0001487428hrzn:DivergentTechnologiesIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime600Floor950300EtpDue7127FiveMember2022-09-30 0001487428hrzn:DivergentTechnologiesIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime600Floor950300EtpDue7127FiveMember2022-01-012022-09-30 0001487428hrzn:DivergentTechnologiesIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime600Floor950300EtpDue7127SixMember2022-09-30 0001487428hrzn:DivergentTechnologiesIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime600Floor950300EtpDue7127SixMember2022-01-012022-09-30 0001487428hrzn:InteriorDefineIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1275CashPrime650Floor975400EtpDue1126OneMember2022-09-30 0001487428hrzn:InteriorDefineIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1275CashPrime650Floor975400EtpDue1126OneMember2022-01-012022-09-30 0001487428hrzn:InteriorDefineIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1275CashPrime650Floor975400EtpDue1126TwoMember2022-09-30 0001487428hrzn:InteriorDefineIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1275CashPrime650Floor975400EtpDue1126TwoMember2022-01-012022-09-30 0001487428hrzn:LyricalFoodsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1300CashPrime675Floor1000975EtpDue1124Member2022-09-30 0001487428hrzn:LyricalFoodsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1300CashPrime675Floor1000975EtpDue1124Member2022-01-012022-09-30 0001487428hrzn:MyforestFoodsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1300CashPrime675Floor1000300EtpDue10125OneMember2022-09-30 0001487428hrzn:MyforestFoodsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1300CashPrime675Floor1000300EtpDue10125OneMember2022-01-012022-09-30 0001487428hrzn:MyforestFoodsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1300CashPrime675Floor1000300EtpDue10125TwoMember2022-09-30 0001487428hrzn:MyforestFoodsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1300CashPrime675Floor1000300EtpDue10125TwoMember2022-01-012022-09-30 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900200EtpDue1126OneMember2022-09-30 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900200EtpDue1126OneMember2022-01-012022-09-30 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900200EtpDue1126TwoMember2022-09-30 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900200EtpDue1126TwoMember2022-01-012022-09-30 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900200EtpDue1126ThreeMember2022-09-30 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900200EtpDue1126ThreeMember2022-01-012022-09-30 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900200EtpDue1126FourMember2022-09-30 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900200EtpDue1126FourMember2022-01-012022-09-30 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900200EtpDue1126FiveMember2022-09-30 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900200EtpDue1126FiveMember2022-01-012022-09-30 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900200EtpDue1126SixMember2022-09-30 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900200EtpDue1126SixMember2022-01-012022-09-30 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900200EtpDue1126SevenMember2022-09-30 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900200EtpDue1126SevenMember2022-01-012022-09-30 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900200EtpDue1126EightMember2022-09-30 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime575Floor900200EtpDue1126EightMember2022-01-012022-09-30 0001487428hrzn:OptoroIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue8127Member2022-09-30 0001487428hrzn:OptoroIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue8127Member2022-01-012022-09-30 0001487428hrzn:PrimaryKidsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1275CashPrime725Floor1050300EtpDue3125OneMember2022-09-30 0001487428hrzn:PrimaryKidsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1275CashPrime725Floor1050300EtpDue3125OneMember2022-01-012022-09-30 0001487428hrzn:PrimaryKidsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1275CashPrime725Floor1050300EtpDue3125TwoMember2022-09-30 0001487428hrzn:PrimaryKidsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1275CashPrime725Floor1050300EtpDue3125TwoMember2022-01-012022-09-30 0001487428hrzn:PrimaryKidsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1275CashPrime725Floor1050300EtpDue9125Member2022-09-30 0001487428hrzn:PrimaryKidsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1275CashPrime725Floor1050300EtpDue9125Member2022-01-012022-09-30 0001487428hrzn:UnagiIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1400CashPrime775Floor1100Due7125OneMember2022-09-30 0001487428hrzn:UnagiIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1400CashPrime775Floor1100Due7125OneMember2022-01-012022-09-30 0001487428hrzn:UnagiIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1400CashPrime775Floor1100Due7125TwoMember2022-09-30 0001487428hrzn:UnagiIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1400CashPrime775Floor1100Due7125TwoMember2022-01-012022-09-30 0001487428hrzn:UnagiIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1400CashPrime775Floor1100Due7125ThreeMember2022-09-30 0001487428hrzn:UnagiIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1400CashPrime775Floor1100Due7125ThreeMember2022-01-012022-09-30 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue9124OneMember2022-09-30 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue9124OneMember2022-01-012022-09-30 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue9124TwoMember2022-09-30 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue9124TwoMember2022-01-012022-09-30 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue9124ThreeMember2022-09-30 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue9124ThreeMember2022-01-012022-09-30 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue9124FourMember2022-09-30 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue9124FourMember2022-01-012022-09-30 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue9124FiveMember2022-09-30 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan1175CashPrime625Floor950400EtpDue9124FiveMember2022-01-012022-09-30 0001487428hrzn:BritecoreHoldingsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1225CashPrime675Floor1000400EtpDue10124OneMember2022-09-30 0001487428hrzn:BritecoreHoldingsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1225CashPrime675Floor1000400EtpDue10124OneMember2022-01-012022-09-30 0001487428hrzn:BritecoreHoldingsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1225CashPrime675Floor1000400EtpDue10124TwoMember2022-09-30 0001487428hrzn:BritecoreHoldingsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1225CashPrime675Floor1000400EtpDue10124TwoMember2022-01-012022-09-30 0001487428hrzn:DecisyonIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1568CashPrime943Floor12685043EtpDue123122Member2022-09-30 0001487428hrzn:DecisyonIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1568CashPrime943Floor12685043EtpDue123122Member2022-01-012022-09-30 0001487428hrzn:DropOffIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1275CashPrime650Floor975350EtpDue4126OneMember2022-09-30 0001487428hrzn:DropOffIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1275CashPrime650Floor975350EtpDue4126OneMember2022-01-012022-09-30 0001487428hrzn:DropOffIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1275CashPrime650Floor975350EtpDue4126TwoMember2022-09-30 0001487428hrzn:DropOffIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1275CashPrime650Floor975350EtpDue4126TwoMember2022-01-012022-09-30 0001487428hrzn:DropOffIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1275CashPrime650Floor975350EtpDue8126Member2022-09-30 0001487428hrzn:DropOffIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1275CashPrime650Floor975350EtpDue8126Member2022-01-012022-09-30 0001487428hrzn:Engage3LLCMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1175CashPrime625Floor975450EtpDue7127OneMember2022-09-30 0001487428hrzn:Engage3LLCMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1175CashPrime625Floor975450EtpDue7127OneMember2022-01-012022-09-30 0001487428hrzn:Engage3LLCMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1175CashPrime625Floor975450EtpDue7127TwoMember2022-09-30 0001487428hrzn:Engage3LLCMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1175CashPrime625Floor975450EtpDue7127TwoMember2022-01-012022-09-30 0001487428hrzn:KodiakRoboticsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1175CashPrime550Floor1025400EtpDue4126OneMember2022-09-30 0001487428hrzn:KodiakRoboticsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1175CashPrime550Floor1025400EtpDue4126OneMember2022-01-012022-09-30 0001487428hrzn:KodiakRoboticsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1175CashPrime550Floor1025400EtpDue4126TwoMember2022-09-30 0001487428hrzn:KodiakRoboticsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1175CashPrime550Floor1025400EtpDue4126TwoMember2022-01-012022-09-30 0001487428hrzn:KodiakRoboticsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1175CashPrime550Floor1025400EtpDue4126ThreeMember2022-09-30 0001487428hrzn:KodiakRoboticsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1175CashPrime550Floor1025400EtpDue4126ThreeMember2022-01-012022-09-30 0001487428hrzn:KodiakRoboticsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1175CashPrime550Floor1025400EtpDue4126FourMember2022-09-30 0001487428hrzn:KodiakRoboticsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1175CashPrime550Floor1025400EtpDue4126FourMember2022-01-012022-09-30 0001487428hrzn:LemongrassHoldingsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1275CashPrime650Floor975250EtpDue3126OneMember2022-09-30 0001487428hrzn:LemongrassHoldingsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1275CashPrime650Floor975250EtpDue3126OneMember2022-01-012022-09-30 0001487428hrzn:LemongrassHoldingsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1275CashPrime650Floor975250EtpDue3126TwoMember2022-09-30 0001487428hrzn:LemongrassHoldingsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1275CashPrime650Floor975250EtpDue3126TwoMember2022-01-012022-09-30 0001487428hrzn:LyticsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1150CashPrime600Floor925300EtpDue7125Member2022-09-30 0001487428hrzn:LyticsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1150CashPrime600Floor925300EtpDue7125Member2022-01-012022-09-30 0001487428hrzn:ReputationInstituteIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1275CashPrime725Floor1050300EtpDue8125Member2022-09-30 0001487428hrzn:ReputationInstituteIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1275CashPrime725Floor1050300EtpDue8125Member2022-01-012022-09-30 0001487428hrzn:SlingshotAerospaceIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1200CashPrime575Floor975500EtpDue8126OneMember2022-09-30 0001487428hrzn:SlingshotAerospaceIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1200CashPrime575Floor975500EtpDue8126OneMember2022-01-012022-09-30 0001487428hrzn:SlingshotAerospaceIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1200CashPrime575Floor975500EtpDue8126TwoMember2022-09-30 0001487428hrzn:SlingshotAerospaceIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1200CashPrime575Floor975500EtpDue8126TwoMember2022-01-012022-09-30 0001487428hrzn:SlingshotAerospaceIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1200CashPrime575Floor975500EtpDue8126ThreeMember2022-09-30 0001487428hrzn:SlingshotAerospaceIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1200CashPrime575Floor975500EtpDue8126ThreeMember2022-01-012022-09-30 0001487428hrzn:SlingshotAerospaceIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1200CashPrime575Floor975500EtpDue8126FourMember2022-09-30 0001487428hrzn:SlingshotAerospaceIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1200CashPrime575Floor975500EtpDue8126FourMember2022-01-012022-09-30 0001487428hrzn:SupplyNetworkVisiblityHoldingsLlcMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1200CashPrime650Floor975400EtpDue2125OneMember2022-09-30 0001487428hrzn:SupplyNetworkVisiblityHoldingsLlcMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1200CashPrime650Floor975400EtpDue2125OneMember2022-01-012022-09-30 0001487428hrzn:SupplyNetworkVisiblityHoldingsLlcMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1200CashPrime650Floor975400EtpDue2125TwoMember2022-09-30 0001487428hrzn:SupplyNetworkVisiblityHoldingsLlcMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1200CashPrime650Floor975400EtpDue2125TwoMember2022-01-012022-09-30 0001487428hrzn:SupplyNetworkVisiblityHoldingsLlcMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1200CashPrime650Floor975400EtpDue12125OneMember2022-09-30 0001487428hrzn:SupplyNetworkVisiblityHoldingsLlcMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1200CashPrime650Floor975400EtpDue12125OneMember2022-01-012022-09-30 0001487428hrzn:SupplyNetworkVisiblityHoldingsLlcMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1200CashPrime650Floor975400EtpDue12125TwoMember2022-09-30 0001487428hrzn:SupplyNetworkVisiblityHoldingsLlcMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1200CashPrime650Floor975400EtpDue12125TwoMember2022-01-012022-09-30 0001487428hrzn:NonaffiliateMemberhrzn:TechnologySegmentMemberus-gaap:DebtSecuritiesMember2022-09-30 0001487428hrzn:NonaffiliateMemberhrzn:HealthcareInformationAndServicesSegmentMemberus-gaap:DebtSecuritiesMember2022-09-30 0001487428hrzn:HoundLabsIncMemberhrzn:DiagnosticsSectorMemberhrzn:TermLoan1225CashPrime600Floor925350EtpDue6126OneMember2022-09-30 0001487428hrzn:HoundLabsIncMemberhrzn:DiagnosticsSectorMemberhrzn:TermLoan1225CashPrime600Floor925350EtpDue6126OneMember2022-01-012022-09-30 0001487428hrzn:HoundLabsIncMemberhrzn:DiagnosticsSectorMemberhrzn:TermLoan1225CashPrime600Floor925350EtpDue6126TwoMember2022-09-30 0001487428hrzn:HoundLabsIncMemberhrzn:DiagnosticsSectorMemberhrzn:TermLoan1225CashPrime600Floor925350EtpDue6126TwoMember2022-01-012022-09-30 0001487428hrzn:HoundLabsIncMemberhrzn:DiagnosticsSectorMemberhrzn:TermLoan1225CashPrime600Floor925350EtpDue6126ThreeMember2022-09-30 0001487428hrzn:HoundLabsIncMemberhrzn:DiagnosticsSectorMemberhrzn:TermLoan1225CashPrime600Floor925350EtpDue6126ThreeMember2022-01-012022-09-30 0001487428hrzn:SecureTransfusionServicesIncMemberhrzn:OtherHealthcareSectorMemberhrzn:TermLoan1200CashPrime575Floor900400EtpDue10125Member2022-09-30 0001487428hrzn:SecureTransfusionServicesIncMemberhrzn:OtherHealthcareSectorMemberhrzn:TermLoan1200CashPrime575Floor900400EtpDue10125Member2022-01-012022-09-30 0001487428hrzn:SecureTransfusionServicesIncMemberhrzn:OtherHealthcareSectorMemberhrzn:TermLoan1200CashPrime575Floor900400EtpDue123125Member2022-09-30 0001487428hrzn:SecureTransfusionServicesIncMemberhrzn:OtherHealthcareSectorMemberhrzn:TermLoan1200CashPrime575Floor900400EtpDue123125Member2022-01-012022-09-30 0001487428hrzn:BrightinsightIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1100CashPrime550Floor950300EtpDue8127OneMember2022-09-30 0001487428hrzn:BrightinsightIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1100CashPrime550Floor950300EtpDue8127OneMember2022-01-012022-09-30 0001487428hrzn:BrightinsightIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1100CashPrime550Floor950300EtpDue8127TwoMember2022-09-30 0001487428hrzn:BrightinsightIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1100CashPrime550Floor950300EtpDue8127TwoMember2022-01-012022-09-30 0001487428hrzn:BrightinsightIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1100CashPrime550Floor950300EtpDue8127ThreeMember2022-09-30 0001487428hrzn:BrightinsightIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1100CashPrime550Floor950300EtpDue8127ThreeMember2022-01-012022-09-30 0001487428hrzn:NonaffiliateMemberus-gaap:DebtSecuritiesMember2022-09-30 0001487428hrzn:NonaffiliateMemberus-gaap:WarrantMember2022-09-30 0001487428hrzn:NonaffiliateMemberhrzn:LifeScienceSegmentMemberus-gaap:WarrantMember2022-09-30 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:CastleCreekBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:CorviumIncMemberhrzn:BiotechnologySectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:EmalexBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:FstarTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:GreenlightBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:ImunonIncMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:ImvIncMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:KSQTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:LogicbioIncMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:MustangBioIncMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:NativeMicrobialsIncMemberhrzn:BiotechnologySectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:PdsBiotechnologyCorporationMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:RocketPharmaceuticalsCorporationMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:StealthBioTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:VtvTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:XerisPharmaceuticalsIncMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:AccuveinIncMemberhrzn:MedicalDeviceSectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:AerinMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:AerobiotixLlcMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:CanaryMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:CeribellIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:CognoaIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:ConventusOrthopaedicsIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:CsaMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:CvrxIncMemberhrzn:MedicalDeviceSectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:InfobionicIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:MagnoliaMedicalTechnologiesIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:MeditrinaIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:ScientiaVascularIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:SonexHealthIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:VeroBiotechLlcMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:SwiftHealthSystemsIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:NonaffiliateMemberhrzn:SustainabilitySegmentMemberus-gaap:WarrantMember2022-09-30 0001487428hrzn:DreamHoldingsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:LiquiglideIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:NexiiBuildingSolutionsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:SoliOrganicIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:NonaffiliateMemberhrzn:TechnologySegmentMemberus-gaap:WarrantMember2022-09-30 0001487428hrzn:AxiomSpaceIncMemberhrzn:CommunicationsSectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:IntelepeerHoldingsIncMemberhrzn:CommunicationsSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:PebblepostIncMemberhrzn:CommunicationsSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:AterianIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:BetterPlaceForestsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:CaastleIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:CampNycIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:ClaraFoodsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:DivergentTechnologiesIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:GetaroundIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:InteriorDefineIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:MyforestFoodsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:OptoroIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:PrimaryKidsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:QuipNycIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:UnagiIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:UpdaterIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:CpgBeyondIncMemberhrzn:DataStorageSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:SilkIncMemberhrzn:DataStorageSectorMemberus-gaap:WarrantMember2022-09-30 0001487428hrzn:GlobalWorldwideLlcMemberhrzn:InternetAndMediaSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:RocketLawyerIncorporatedMemberhrzn:InternetAndMediaSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:SkillshareIncMemberhrzn:InternetAndMediaSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:HalioIncMemberhrzn:PowerManagementSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:AvalancheTechnologyIncMemberhrzn:SemiconductorSectorMemberus-gaap:WarrantMember2022-09-30 0001487428hrzn:BritecoreHoldingsIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:DecisyonIncMemberhrzn:SoftwareSectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:DropOffIncMemberhrzn:SoftwareSectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:ELaCarteIncMemberhrzn:SoftwareSectorMemberhrzn:CommonStockWarrantsMember2022-09-30 0001487428hrzn:KodiakRoboticsIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:LemongrassHoldingsIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:LotameSolutionsIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:LyticsIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:ReputationInstituteIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:RevinateHoldingsIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:RivDataCorpMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:SignixIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:SkywordIncMemberhrzn:SoftwareSectorMemberus-gaap:WarrantMember2022-09-30 0001487428hrzn:SlingshotAerospaceIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:SupplyNetworkVisiblityHoldingsLlcMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:TopiaMobilityIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:XadIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:NonaffiliateMemberhrzn:HealthcareInformationAndServicesSegmentMemberus-gaap:WarrantMember2022-09-30 0001487428hrzn:HoundLabsIncMemberhrzn:DiagnosticsSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:KateFarmsIncMemberhrzn:OtherHealthcareSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:WatermarkMedicalIncMemberhrzn:OtherHealthcareSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:SecureTransfusionServicesIncMemberhrzn:OtherHealthcareSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:BrightinsightIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:MedsphereSystemsCorporationMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2022-09-30 0001487428hrzn:NonaffiliateMemberus-gaap:OtherLongTermInvestmentsMember2022-09-30 0001487428hrzn:LumitheraIncMemberhrzn:MedicalDeviceSectorMemberhrzn:RoyaltyAgreementMember2022-09-30 0001487428hrzn:ZetrozIncMemberhrzn:MedicalDeviceSectorMemberhrzn:RoyaltyAgreementMember2022-09-30 0001487428hrzn:NonaffiliateMemberus-gaap:EquitySecuritiesMember2022-09-30 0001487428hrzn:CastleCreekBiosciencesIncMemberhrzn:BiotechnologySectorMemberus-gaap:PreferredStockMember2022-09-30 0001487428hrzn:SnagajobcomIncMemberhrzn:ConsumerrelatedTechnologiesMemberus-gaap:CommonStockMember2022-09-30 0001487428hrzn:LumitheraIncMemberhrzn:MedicalDeviceSectorMemberus-gaap:CommonStockMember2022-09-30 0001487428hrzn:BrandedOnlineIncMemberhrzn:SoftwareSectorMemberus-gaap:CommonStockMember2022-09-30 0001487428hrzn:DecisyonIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredAndCommonStockMember2022-09-30 0001487428hrzn:UnrestrictedShortTermInvestmentsMember2022-09-30 0001487428hrzn:MoneyMarketFundsUnrestrictedInvestmentMember2022-09-30 0001487428hrzn:RestrictedShortTermInvestmentsMember2022-09-30 0001487428hrzn:MoneyMarketFundsRestrictedInvestmentsMember2022-09-30 0001487428srt:AffiliatedEntityMemberhrzn:AssetbackedNotesMember2019-08-13 0001487428hrzn:AssetbackedNotesMember2019-08-13 0001487428hrzn:NonaffiliateMember2021-12-31 0001487428hrzn:NonaffiliateMemberus-gaap:DebtSecuritiesMember2021-12-31 0001487428hrzn:NonaffiliateMemberhrzn:LifeScienceSegmentMemberus-gaap:DebtSecuritiesMember2021-12-31 0001487428hrzn:CastleCreekPharmaceuticalsHoldingsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan930CashLibor750Floor930500EtpDue3124OneMember2021-12-31 0001487428hrzn:CastleCreekPharmaceuticalsHoldingsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan930CashLibor750Floor930500EtpDue3124OneMember2021-01-012021-12-31 0001487428hrzn:CastleCreekPharmaceuticalsHoldingsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan930CashLibor750Floor930500EtpDue3124TwoMember2021-12-31 0001487428hrzn:CastleCreekPharmaceuticalsHoldingsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan930CashLibor750Floor930500EtpDue3124TwoMember2021-01-012021-12-31 0001487428hrzn:CastleCreekPharmaceuticalsHoldingsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan930CashLibor750Floor930500EtpDue3124ThreeMember2021-12-31 0001487428hrzn:CastleCreekPharmaceuticalsHoldingsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan930CashLibor750Floor930500EtpDue3124ThreeMember2021-01-012021-12-31 0001487428hrzn:CastleCreekPharmaceuticalsHoldingsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan930CashLibor750Floor930500EtpDue3124FourMember2021-12-31 0001487428hrzn:CastleCreekPharmaceuticalsHoldingsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan930CashLibor750Floor930500EtpDue3124FourMember2021-01-012021-12-31 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor95030EtpDue1125OneMember2021-12-31 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor95030EtpDue1125OneMember2021-01-012021-12-31 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor95030EtpDue1125TwoMember2021-12-31 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor95030EtpDue1125TwoMember2021-01-012021-12-31 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor95030EtpDue1125ThreeMember2021-12-31 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor95030EtpDue1125ThreeMember2021-01-012021-12-31 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor95030EtpDue2125FourMember2021-12-31 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor95030EtpDue2125FourMember2021-01-012021-12-31 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor95030EtpDue2125FiveMember2021-12-31 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor95030EtpDue2125FiveMember2021-01-012021-12-31 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor95030EtpDue4125SixMember2021-12-31 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor95030EtpDue4125SixMember2021-01-012021-12-31 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor95030EtpDue4125SevenMember2021-12-31 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor95030EtpDue4125SevenMember2021-01-012021-12-31 0001487428hrzn:EmalexBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan975CashLibor790Floor975500EtpDue6124OneMember2021-12-31 0001487428hrzn:EmalexBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan975CashLibor790Floor975500EtpDue6124OneMember2021-01-012021-12-31 0001487428hrzn:EmalexBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan975CashLibor790Floor975500EtpDue6124TwoMember2021-12-31 0001487428hrzn:EmalexBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan975CashLibor790Floor975500EtpDue6124TwoMember2021-01-012021-12-31 0001487428hrzn:EmalexBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan975CashLibor790Floor975500EtpDue11125OneMember2021-12-31 0001487428hrzn:EmalexBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan975CashLibor790Floor975500EtpDue11125OneMember2021-01-012021-12-31 0001487428hrzn:FstarTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue4125OneMember2021-12-31 0001487428hrzn:FstarTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue4125OneMember2021-01-012021-12-31 0001487428hrzn:FstarTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue7125TwoMember2021-12-31 0001487428hrzn:FstarTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue7125TwoMember2021-01-012021-12-31 0001487428hrzn:GreenlightBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue7125OneMember2021-12-31 0001487428hrzn:GreenlightBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue7125OneMember2021-01-012021-12-31 0001487428hrzn:GreenlightBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue7125TwoMember2021-12-31 0001487428hrzn:GreenlightBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue7125TwoMember2021-01-012021-12-31 0001487428hrzn:ImvIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan900CashPrime625Floor900500EtpDue7125OneMember2021-12-31 0001487428hrzn:ImvIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan900CashPrime625Floor900500EtpDue7125OneMember2021-01-012021-12-31 0001487428hrzn:ImvIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan900CashPrime625Floor900500EtpDue7125TwoMember2021-12-31 0001487428hrzn:ImvIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan900CashPrime625Floor900500EtpDue7125TwoMember2021-01-012021-12-31 0001487428hrzn:LogicbioIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan875CashLibor625Floor875450EtpDue6124OneMember2021-12-31 0001487428hrzn:LogicbioIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan875CashLibor625Floor875450EtpDue6124OneMember2021-01-012021-12-31 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashLibor850Floor950550EtpDue12124OneMember2021-12-31 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashLibor850Floor950550EtpDue12124OneMember2021-01-012021-12-31 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashLibor850Floor950550EtpDue12124TwoMember2021-12-31 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashLibor850Floor950550EtpDue12124TwoMember2021-01-012021-12-31 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashLibor850Floor950550EtpDue12124ThreeMember2021-12-31 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashLibor850Floor950550EtpDue12124ThreeMember2021-01-012021-12-31 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashLibor850Floor950550EtpDue12124FourMember2021-12-31 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashLibor850Floor950550EtpDue12124FourMember2021-01-012021-12-31 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashLibor850Floor950550EtpDue12124FiveMember2021-12-31 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashLibor850Floor950550EtpDue12124FiveMember2021-01-012021-12-31 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashLibor850Floor950550EtpDue12124SixMember2021-12-31 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan950CashLibor850Floor950550EtpDue12124SixMember2021-01-012021-12-31 0001487428hrzn:StealthBioTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan875CashPrime550Floor87560EtpDue10125OneMember2021-12-31 0001487428hrzn:StealthBioTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan875CashPrime550Floor87560EtpDue10125OneMember2021-01-012021-12-31 0001487428hrzn:StealthBioTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan875CashPrime550Floor87560EtpDue10125TwoMember2021-12-31 0001487428hrzn:StealthBioTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:TermLoan875CashPrime550Floor87560EtpDue10125TwoMember2021-01-012021-12-31 0001487428hrzn:CanaryMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan900CashPrime575Floor900700EtpDue11124OneMember2021-12-31 0001487428hrzn:CanaryMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan900CashPrime575Floor900700EtpDue11124OneMember2021-01-012021-12-31 0001487428hrzn:CeribellIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan825CashLibor670Floor825550EtpDue10124OneMember2021-12-31 0001487428hrzn:CeribellIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan825CashLibor670Floor825550EtpDue10124OneMember2021-01-012021-12-31 0001487428hrzn:CeribellIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan825CashLibor670Floor825550EtpDue10124TwoMember2021-12-31 0001487428hrzn:CeribellIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan825CashLibor670Floor825550EtpDue10124TwoMember2021-01-012021-12-31 0001487428hrzn:CeribellIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan825CashLibor670Floor825550EtpDue10124ThreeMember2021-12-31 0001487428hrzn:CeribellIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan825CashLibor670Floor825550EtpDue10124ThreeMember2021-01-012021-12-31 0001487428hrzn:CeribellIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan825CashLibor670Floor825550EtpDue10124FourMember2021-12-31 0001487428hrzn:CeribellIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan825CashLibor670Floor825550EtpDue10124FourMember2021-01-012021-12-31 0001487428hrzn:ConventusOrthopaedicsIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan925CashLibor800Floor9251036EtpDue7125OneMember2021-12-31 0001487428hrzn:ConventusOrthopaedicsIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan925CashLibor800Floor9251036EtpDue7125OneMember2021-01-012021-12-31 0001487428hrzn:ConventusOrthopaedicsIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan925CashLibor800Floor9251036EtpDue7125TwoMember2021-12-31 0001487428hrzn:ConventusOrthopaedicsIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan925CashLibor800Floor9251036EtpDue7125TwoMember2021-01-012021-12-31 0001487428hrzn:CorinthMedtechIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan850CashPrime525Floor8502000EtpDue4122OneMember2021-12-31 0001487428hrzn:CorinthMedtechIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan850CashPrime525Floor8502000EtpDue4122OneMember2021-01-012021-12-31 0001487428hrzn:CorinthMedtechIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan850CashPrime525Floor8502000EtpDue4122TwoMember2021-12-31 0001487428hrzn:CorinthMedtechIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan850CashPrime525Floor8502000EtpDue4122TwoMember2021-01-012021-12-31 0001487428hrzn:CsaMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1000CashLibor820Floor1000500EtpDue1124OneMember2021-12-31 0001487428hrzn:CsaMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1000CashLibor820Floor1000500EtpDue1124OneMember2021-01-012021-12-31 0001487428hrzn:CsaMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1000CashLibor820Floor1000500EtpDue1124TwoMember2021-12-31 0001487428hrzn:CsaMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1000CashLibor820Floor1000500EtpDue1124TwoMember2021-01-012021-12-31 0001487428hrzn:CsaMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan930CashLibor750Floor930500EtpDue3124OneMember2021-12-31 0001487428hrzn:CsaMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan930CashLibor750Floor930500EtpDue3124OneMember2021-01-012021-12-31 0001487428hrzn:EmbodyIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan975CashPrime650Floor9752800EtpDue8126OneMember2021-12-31 0001487428hrzn:EmbodyIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan975CashPrime650Floor9752800EtpDue8126OneMember2021-01-012021-12-31 0001487428hrzn:InfobionicIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue10124OneMember2021-12-31 0001487428hrzn:InfobionicIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue10124OneMember2021-01-012021-12-31 0001487428hrzn:InfobionicIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue6125OneMember2021-12-31 0001487428hrzn:InfobionicIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue6125OneMember2021-01-012021-12-31 0001487428hrzn:MaculogixIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1008CashLibor768Floor1008600EtpDue9123OneMember2021-12-31 0001487428hrzn:MaculogixIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1008CashLibor768Floor1008600EtpDue9123OneMember2021-01-012021-12-31 0001487428hrzn:MaculogixIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1008CashLibor768Floor1008600EtpDue9123TwoMember2021-12-31 0001487428hrzn:MaculogixIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1008CashLibor768Floor1008600EtpDue9123TwoMember2021-01-012021-12-31 0001487428hrzn:MagnoliaMedicalTechnologiesIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan975CashPrime500Floor975400EtpDue3125OneMember2021-12-31 0001487428hrzn:MagnoliaMedicalTechnologiesIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan975CashPrime500Floor975400EtpDue3125OneMember2021-01-012021-12-31 0001487428hrzn:MagnoliaMedicalTechnologiesIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan975CashPrime500Floor975400EtpDue3125TwoMember2021-12-31 0001487428hrzn:MagnoliaMedicalTechnologiesIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan975CashPrime500Floor975400EtpDue3125TwoMember2021-01-012021-12-31 0001487428hrzn:MagnoliaMedicalTechnologiesIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan975CashPrime500Floor975400EtpDue3125ThreeMember2021-12-31 0001487428hrzn:MagnoliaMedicalTechnologiesIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan975CashPrime500Floor975400EtpDue3125ThreeMember2021-01-012021-12-31 0001487428hrzn:MagnoliaMedicalTechnologiesIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan975CashPrime500Floor975400EtpDue3125FourMember2021-12-31 0001487428hrzn:MagnoliaMedicalTechnologiesIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan975CashPrime500Floor975400EtpDue3125FourMember2021-01-012021-12-31 0001487428hrzn:SonexHealthIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan925CashPrime600Floor925500EtpDue6124OneMember2021-12-31 0001487428hrzn:SonexHealthIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan925CashPrime600Floor925500EtpDue6124OneMember2021-01-012021-12-31 0001487428hrzn:SonexHealthIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan925CashPrime600Floor925500EtpDue6124TwoMember2021-12-31 0001487428hrzn:SonexHealthIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan925CashPrime600Floor925500EtpDue6124TwoMember2021-01-012021-12-31 0001487428hrzn:SonexHealthIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan925CashPrime600Floor925500EtpDue6124ThreeMember2021-12-31 0001487428hrzn:SonexHealthIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan925CashPrime600Floor925500EtpDue6124ThreeMember2021-01-012021-12-31 0001487428hrzn:SpineologyIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1025CashPrime700Floor1025100EtpDue10125OneMember2021-12-31 0001487428hrzn:SpineologyIncMemberhrzn:MedicalDeviceSectorMemberhrzn:TermLoan1025CashPrime700Floor1025100EtpDue10125OneMember2021-01-012021-12-31 0001487428hrzn:NonaffiliateMemberhrzn:LifeScienceSegmentMemberhrzn:DebtInvestmentsMember2021-12-31 0001487428hrzn:NonaffiliateMemberhrzn:SustainabilitySegmentMemberus-gaap:DebtSecuritiesMember2021-12-31 0001487428hrzn:LiquiglideIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan950CashPrime625Floor950500EtpDue1125Member2021-12-31 0001487428hrzn:LiquiglideIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan950CashPrime625Floor950500EtpDue1125Member2021-01-012021-12-31 0001487428hrzn:NexiiBuildingSolutionsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1025CashPrime700Floor1025250EtpDue9125OneMember2021-12-31 0001487428hrzn:NexiiBuildingSolutionsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1025CashPrime700Floor1025250EtpDue9125OneMember2021-01-012021-12-31 0001487428hrzn:NexiiBuildingSolutionsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1025CashPrime700Floor1025250EtpDue9125TwoMember2021-12-31 0001487428hrzn:NexiiBuildingSolutionsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1025CashPrime700Floor1025250EtpDue9125TwoMember2021-01-012021-12-31 0001487428hrzn:NexiiBuildingSolutionsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1025CashPrime700Floor1025250EtpDue9125ThreeMember2021-12-31 0001487428hrzn:NexiiBuildingSolutionsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1025CashPrime700Floor1025250EtpDue9125ThreeMember2021-01-012021-12-31 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1000CashPrime675Floor1000250EtpDue6125OneMember2021-12-31 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1000CashPrime675Floor1000250EtpDue6125OneMember2021-01-012021-12-31 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1000CashPrime675Floor1000250EtpDue6125TwoMember2021-12-31 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1000CashPrime675Floor1000250EtpDue6125TwoMember2021-01-012021-12-31 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1000CashPrime675Floor1000250EtpDue10125OneMember2021-12-31 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1000CashPrime675Floor1000250EtpDue10125OneMember2021-01-012021-12-31 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1000CashPrime675Floor1000250EtpDue10125TwoMember2021-12-31 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1000CashPrime675Floor1000250EtpDue10125TwoMember2021-01-012021-12-31 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1000CashPrime675Floor1000250EtpDue10125ThreeMember2021-12-31 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:TermLoan1000CashPrime675Floor1000250EtpDue10125ThreeMember2021-01-012021-12-31 0001487428hrzn:NonaffiliateMemberhrzn:SustainabilitySegmentMemberhrzn:DebtInvestmentsMember2021-12-31 0001487428hrzn:NonaffiliateMemberhrzn:TechnologySegmentMemberus-gaap:DebtSecuritiesMember2021-12-31 0001487428hrzn:AxiomSpaceIncMemberhrzn:CommunicationsSectorMemberhrzn:TermLoan925CashPrime600Floor925250EtpDue6126OneMember2021-12-31 0001487428hrzn:AxiomSpaceIncMemberhrzn:CommunicationsSectorMemberhrzn:TermLoan925CashPrime600Floor925250EtpDue6126OneMember2021-01-012021-12-31 0001487428hrzn:AxiomSpaceIncMemberhrzn:CommunicationsSectorMemberhrzn:TermLoan925CashPrime600Floor925250EtpDue6126TwoMember2021-12-31 0001487428hrzn:AxiomSpaceIncMemberhrzn:CommunicationsSectorMemberhrzn:TermLoan925CashPrime600Floor925250EtpDue6126TwoMember2021-01-012021-12-31 0001487428hrzn:AxiomSpaceIncMemberhrzn:CommunicationsSectorMemberhrzn:TermLoan925CashPrime600Floor925250EtpDue6126ThreeMember2021-12-31 0001487428hrzn:AxiomSpaceIncMemberhrzn:CommunicationsSectorMemberhrzn:TermLoan925CashPrime600Floor925250EtpDue6126ThreeMember2021-01-012021-12-31 0001487428hrzn:AxiomSpaceIncMemberhrzn:CommunicationsSectorMemberhrzn:ConvertibleNote300Due7123Member2021-12-31 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1000CashPrime675Floor1000300EtpDue1125OneMember2021-12-31 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1000CashPrime675Floor1000300EtpDue1125OneMember2021-01-012021-12-31 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1000CashPrime675Floor1000300EtpDue1125TwoMember2021-12-31 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1000CashPrime675Floor1000300EtpDue1125TwoMember2021-01-012021-12-31 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1000CashPrime675Floor1000300EtpDue1125ThreeMember2021-12-31 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1000CashPrime675Floor1000300EtpDue1125ThreeMember2021-01-012021-12-31 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1000CashPrime675Floor1000300EtpDue12125Member2021-12-31 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1000CashPrime675Floor1000300EtpDue12125Member2021-01-012021-12-31 0001487428hrzn:BetterPlaceForestsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan950CashPrime625Floor950185EtpDue7125Member2021-12-31 0001487428hrzn:BetterPlaceForestsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan950CashPrime625Floor950185EtpDue7125Member2021-01-012021-12-31 0001487428hrzn:CampNycIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1050CashPrime725Floor1050300EtpDue5126Member2021-12-31 0001487428hrzn:CampNycIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1050CashPrime725Floor1050300EtpDue5126Member2021-01-012021-12-31 0001487428hrzn:ClaraFoodsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan900CashPrime575Floor900550EtpDue8125OneMember2021-12-31 0001487428hrzn:ClaraFoodsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan900CashPrime575Floor900550EtpDue8125OneMember2021-01-012021-12-31 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan900CashPrime575Floor900550EtpDue8125TwoMember2021-12-31 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan900CashPrime575Floor900550EtpDue8125TwoMember2021-01-012021-12-31 0001487428hrzn:InteriorDefineIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan975CashPrime650Floor975400EtpDue1126OneMember2021-12-31 0001487428hrzn:InteriorDefineIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan975CashPrime650Floor975400EtpDue1126OneMember2021-01-012021-12-31 0001487428hrzn:InteriorDefineIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan975CashPrime650Floor975400EtpDue1126TwoMember2021-12-31 0001487428hrzn:InteriorDefineIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan975CashPrime650Floor975400EtpDue1126TwoMember2021-01-012021-12-31 0001487428hrzn:LyricalFoodsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1000CashPrime675Floor1000975EtpDue1124Member2021-12-31 0001487428hrzn:LyricalFoodsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1000CashPrime675Floor1000975EtpDue1124Member2021-01-012021-12-31 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan900CashPrime575Floor9001010EtpDue1126OneMember2021-12-31 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan900CashPrime575Floor9001010EtpDue1126OneMember2021-01-012021-12-31 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan900CashPrime575Floor9001010EtpDue1126TwoMember2021-12-31 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan900CashPrime575Floor9001010EtpDue1126TwoMember2021-01-012021-12-31 0001487428hrzn:PrimaryKidsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1050CashPrime725Floor1050300EtpDue3125OneMember2021-12-31 0001487428hrzn:PrimaryKidsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1050CashPrime725Floor1050300EtpDue3125OneMember2021-01-012021-12-31 0001487428hrzn:PrimaryKidsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1050CashPrime725Floor1050300EtpDue3125TwoMember2021-12-31 0001487428hrzn:PrimaryKidsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1050CashPrime725Floor1050300EtpDue3125TwoMember2021-01-012021-12-31 0001487428hrzn:PrimaryKidsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1050CashPrime725Floor1050300EtpDue9125Member2021-12-31 0001487428hrzn:PrimaryKidsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1050CashPrime725Floor1050300EtpDue9125Member2021-01-012021-12-31 0001487428hrzn:QuipNycIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime800Floor1125300EtpDue4126Member2021-12-31 0001487428hrzn:QuipNycIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1125CashPrime800Floor1125300EtpDue4126Member2021-01-012021-12-31 0001487428hrzn:UnagiIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1100CashPrime775Floor1100Due7125OneMember2021-12-31 0001487428hrzn:UnagiIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1100CashPrime775Floor1100Due7125OneMember2021-01-012021-12-31 0001487428hrzn:UnagiIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1100CashPrime775Floor1100Due7125TwoMember2021-12-31 0001487428hrzn:UnagiIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1100CashPrime775Floor1100Due7125TwoMember2021-01-012021-12-31 0001487428hrzn:UpdaterIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1200CashPrime575Floor1200Ceiling1400056EtpDue122024OneMember2021-12-31 0001487428hrzn:UpdaterIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1200CashPrime575Floor1200Ceiling1400056EtpDue122024OneMember2021-01-012021-12-31 0001487428hrzn:UpdaterIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1200CashPrime575Floor1200Ceiling1400056EtpDue122024TwoMember2021-12-31 0001487428hrzn:UpdaterIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1200CashPrime575Floor1200Ceiling1400056EtpDue122024TwoMember2021-01-012021-12-31 0001487428hrzn:UpdaterIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1200CashPrime575Floor1200Ceiling1400056EtpDue122024ThreeMember2021-12-31 0001487428hrzn:UpdaterIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:TermLoan1200CashPrime575Floor1200Ceiling1400056EtpDue122024ThreeMember2021-01-012021-12-31 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue9124OneMember2021-12-31 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue9124OneMember2021-01-012021-12-31 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue9124TwoMember2021-12-31 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue9124TwoMember2021-01-012021-12-31 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue9124ThreeMember2021-12-31 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue9124ThreeMember2021-01-012021-12-31 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue9124FourMember2021-12-31 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue9124FourMember2021-01-012021-12-31 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue9124FiveMember2021-12-31 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:TermLoan950CashPrime625Floor950400EtpDue9124FiveMember2021-01-012021-12-31 0001487428hrzn:BrandedOnlineIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan950CashPrime625Floor950600EtpDue9126Member2021-12-31 0001487428hrzn:BrandedOnlineIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan950CashPrime625Floor950600EtpDue9126Member2021-01-012021-12-31 0001487428hrzn:BrandedOnlineIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan950CashPrime625Floor950600EtpDue11126Member2021-12-31 0001487428hrzn:BrandedOnlineIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan950CashPrime625Floor950600EtpDue11126Member2021-01-012021-12-31 0001487428hrzn:BrandedOnlineIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan950CashPrime625Floor9500EtpDue7123Member2021-12-31 0001487428hrzn:BrandedOnlineIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan950CashPrime625Floor9500EtpDue7123Member2021-01-012021-12-31 0001487428hrzn:BritecoreHoldingsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1050CashPrime725Floor1050400EtpDue10124OneMember2021-12-31 0001487428hrzn:BritecoreHoldingsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1050CashPrime725Floor1050400EtpDue10124OneMember2021-01-012021-12-31 0001487428hrzn:BritecoreHoldingsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1050CashPrime725Floor1050400EtpDue10124TwoMember2021-12-31 0001487428hrzn:BritecoreHoldingsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1050CashPrime725Floor1050400EtpDue10124TwoMember2021-01-012021-12-31 0001487428hrzn:DecisyonIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1268CashPrime923Floor12685043EtpDue1123Member2021-12-31 0001487428hrzn:DecisyonIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1268CashPrime923Floor12685043EtpDue1123Member2021-01-012021-12-31 0001487428hrzn:DropOffIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan975CashPrime650Floor975350EtpDue4126OneMember2021-12-31 0001487428hrzn:DropOffIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan975CashPrime650Floor975350EtpDue4126OneMember2021-01-012021-12-31 0001487428hrzn:DropOffIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan975CashPrime650Floor975350EtpDue4126TwoMember2021-12-31 0001487428hrzn:DropOffIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan975CashPrime650Floor975350EtpDue4126TwoMember2021-01-012021-12-31 0001487428hrzn:ELaCarteIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan975CashPrime650Floor975400EtpDue10125OneMember2021-12-31 0001487428hrzn:ELaCarteIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan975CashPrime650Floor975400EtpDue10125OneMember2021-01-012021-12-31 0001487428hrzn:ELaCarteIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan975CashPrime650Floor975400EtpDue10125TwoMember2021-12-31 0001487428hrzn:ELaCarteIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan975CashPrime650Floor975400EtpDue10125TwoMember2021-01-012021-12-31 0001487428hrzn:ELaCarteIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan975CashPrime650Floor975400EtpDue10125ThreeMember2021-12-31 0001487428hrzn:ELaCarteIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan975CashPrime650Floor975400EtpDue10125ThreeMember2021-01-012021-12-31 0001487428hrzn:LyticsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan925CashPrime600Floor925400EtpDue7125Member2021-12-31 0001487428hrzn:LyticsIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan925CashPrime600Floor925400EtpDue7125Member2021-01-012021-12-31 0001487428hrzn:ReputationInstituteIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1050CashPrime725Floor1050300EtpDue8125Member2021-12-31 0001487428hrzn:ReputationInstituteIncMemberhrzn:SoftwareSectorMemberhrzn:TermLoan1050CashPrime725Floor1050300EtpDue8125Member2021-01-012021-12-31 0001487428hrzn:SupplyNetworkVisiblityHoldingsLlcMemberhrzn:SoftwareSectorMemberhrzn:TermLoan975CashPrime650Floor975400EtpDue2125Member2021-12-31 0001487428hrzn:SupplyNetworkVisiblityHoldingsLlcMemberhrzn:SoftwareSectorMemberhrzn:TermLoan975CashPrime650Floor975400EtpDue2125Member2021-01-012021-12-31 0001487428hrzn:SupplyNetworkVisiblityHoldingsLlcMemberhrzn:SoftwareSectorMemberhrzn:TermLoan975CashPrime650Floor975400EtpDue2125TwoMember2021-12-31 0001487428hrzn:SupplyNetworkVisiblityHoldingsLlcMemberhrzn:SoftwareSectorMemberhrzn:TermLoan975CashPrime650Floor975400EtpDue2125TwoMember2021-01-012021-12-31 0001487428hrzn:SupplyNetworkVisiblityHoldingsLlcMemberhrzn:SoftwareSectorMemberhrzn:TermLoan975CashPrime650Floor975400EtpDue12125OneMember2021-12-31 0001487428hrzn:SupplyNetworkVisiblityHoldingsLlcMemberhrzn:SoftwareSectorMemberhrzn:TermLoan975CashPrime650Floor975400EtpDue12125OneMember2021-01-012021-12-31 0001487428hrzn:SupplyNetworkVisiblityHoldingsLlcMemberhrzn:SoftwareSectorMemberhrzn:TermLoan975CashPrime650Floor975400EtpDue12125TwoMember2021-12-31 0001487428hrzn:SupplyNetworkVisiblityHoldingsLlcMemberhrzn:SoftwareSectorMemberhrzn:TermLoan975CashPrime650Floor975400EtpDue12125TwoMember2021-01-012021-12-31 0001487428hrzn:NonaffiliateMemberhrzn:TechnologySegmentMemberhrzn:DebtInvestmentsMember2021-12-31 0001487428hrzn:NonaffiliateMemberhrzn:HealthcareInformationAndServicesSegmentMemberhrzn:DebtInvestmentsMember2021-12-31 0001487428hrzn:IdbydnaIncMemberhrzn:DiagnosticsSectorMemberhrzn:TermLoan900CashPrime575Floor900550EtpDue1125OneMember2021-12-31 0001487428hrzn:IdbydnaIncMemberhrzn:DiagnosticsSectorMemberhrzn:TermLoan900CashPrime575Floor900550EtpDue1125OneMember2021-01-012021-12-31 0001487428hrzn:IdbydnaIncMemberhrzn:DiagnosticsSectorMemberhrzn:TermLoan900CashPrime575Floor900550EtpDue1125TwoMember2021-12-31 0001487428hrzn:IdbydnaIncMemberhrzn:DiagnosticsSectorMemberhrzn:TermLoan900CashPrime575Floor900550EtpDue1125TwoMember2021-01-012021-12-31 0001487428hrzn:IdbydnaIncMemberhrzn:DiagnosticsSectorMemberhrzn:TermLoan900CashPrime575Floor900550EtpDue1126Member2021-12-31 0001487428hrzn:IdbydnaIncMemberhrzn:DiagnosticsSectorMemberhrzn:TermLoan900CashPrime575Floor900550EtpDue1126Member2021-01-012021-12-31 0001487428hrzn:NonaffiliateMemberhrzn:DebtInvestmentsMember2021-12-31 0001487428hrzn:NonaffiliateMemberus-gaap:WarrantMember2021-12-31 0001487428hrzn:NonaffiliateMemberhrzn:LifeScienceMemberus-gaap:WarrantMember2021-12-31 0001487428hrzn:AvaloTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:CastleCreekBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:CelsionCorporationMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:CorviumIncMemberhrzn:BiotechnologySectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:EmalexBiosciencesIncMemberhrzn:BiotechnologySectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:FstarTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:ImvIncMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:LogicbioIncMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:MustangBioIncMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:ProviviIncMemberhrzn:BiotechnologySectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:RocketPharmaceuticalsCorporationMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:StealthBioTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:StrongbridgeUsIncMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:VtvTherapeuticsIncMemberhrzn:BiotechnologySectorMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:AccuveinIncMemberhrzn:MedicalDeviceSectorMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:AerinMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:CanaryMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:CeribellIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:ConventusOrthopaedicsIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:CsaMedicalIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:CvrxIncMemberhrzn:MedicalDeviceSectorMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:InfobionicIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:MaculogixIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:MagnoliaMedicalTechnologiesIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:MeditrinaIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:SonexHealthIncMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:VeroBiotechLlcMemberhrzn:MedicalDeviceSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:NonaffiliateMemberhrzn:LifeScienceSegmentMemberus-gaap:WarrantMember2021-12-31 0001487428hrzn:NonaffiliateMemberhrzn:SustainabilitySegmentMemberus-gaap:WarrantMember2021-12-31 0001487428hrzn:LiquiglideIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:NexiiBuildingSolutionsIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:TemperpackTechnologiesIncMemberhrzn:OtherSustainabilitySectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:NonaffiliateMemberhrzn:TechnologySegmentMemberus-gaap:WarrantMember2021-12-31 0001487428hrzn:AxiomSpaceIncMemberhrzn:CommunicationsSectorMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:IntelepeerHoldingsIncMemberhrzn:CommunicationsSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:PebblepostIncMemberhrzn:CommunicationsSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:AlulaHoldingsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:AterianIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:BetterPlaceForestsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:CaastleIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:CampNycIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:ClaraFoodsCoMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:GetaroundIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:InteriorDefineIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:NextcarHoldingCompanyIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:PrimaryKidsIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:QuipNycIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:UnagiIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:UpdaterIncMemberhrzn:ConsumerrelatedTechnologiesMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:CpgBeyondIncMemberhrzn:DataStorageMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:SilkIncMemberhrzn:DataStorageMemberus-gaap:WarrantMember2021-12-31 0001487428hrzn:GlobalWorldwideLlcMemberhrzn:InternetAndMediaSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:RocketLawyerIncorporatedMemberhrzn:InternetAndMediaSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:SkillshareIncMemberhrzn:InternetAndMediaSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:LiqidIncMemberhrzn:NetworkingSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:KinestralIncMemberhrzn:PowerManagementSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:AvalancheTechnologyIncMemberhrzn:SemiconductorSectorMemberus-gaap:WarrantMember2021-12-31 0001487428hrzn:BrandedOnlineIncMemberhrzn:SoftwareSectorMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:BritecoreHoldingsIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:DecisyonIncMemberhrzn:SoftwareSectorMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:DropOffIncMemberhrzn:SoftwareSectorMemberhrzn:CommonStockWarrantsMember2021-12-31 0001487428hrzn:ELaCarteIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:LotameSolutionsIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:LyticsIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:ReputationInstituteIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:RevinateHoldingsIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:RivDataCorpMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:SignixIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:SkywordIncMemberhrzn:SoftwareSectorMemberus-gaap:WarrantMember2021-12-31 0001487428hrzn:SupplyNetworkVisiblityHoldingsLlcMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:TopiaMobilityIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:XadIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:NonaffiliateMemberhrzn:HealthcareInformationAndServicesSegmentMemberus-gaap:WarrantMember2021-12-31 0001487428hrzn:IdbydnaIncMemberhrzn:DiagnosticsSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:KateFarmsIncMemberhrzn:OtherHealthcareSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:WatermarkMedicalIncMemberhrzn:OtherHealthcareSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:MedsphereSystemsCorporationMemberhrzn:SoftwareSectorMemberhrzn:PreferredStockWarrantsMember2021-12-31 0001487428hrzn:NonaffiliateMemberus-gaap:OtherLongTermInvestmentsMember2021-12-31 0001487428hrzn:ZetrozIncMemberhrzn:MedicalDeviceSectorMemberhrzn:RoyaltyAgreementMember2021-12-31 0001487428hrzn:NonaffiliateMemberus-gaap:EquitySecuritiesMember2021-12-31 0001487428hrzn:SnagajobcomIncMemberhrzn:ConsumerrelatedTechnologiesMemberus-gaap:CommonStockMember2021-12-31 0001487428hrzn:ZetaGlobalHoldingsCorpMemberhrzn:InternetAndMediaSectorMemberus-gaap:CommonStockMember2021-12-31 0001487428hrzn:DecisyonIncMemberhrzn:SoftwareSectorMemberhrzn:PreferredAndCommonStockMember2021-12-31 0001487428hrzn:NonaffiliateMemberhrzn:PreferredAndCommonStockMember2021-12-31 0001487428hrzn:ControlledAffiliateMember2021-12-31 0001487428hrzn:ControlledAffiliateMemberhrzn:BiotechnologySectorMemberus-gaap:OtherLongTermInvestmentsMember2021-12-31 0001487428hrzn:HESPLLCMemberhrzn:BiotechnologySectorMemberus-gaap:OtherLongTermInvestmentsMember2021-12-31 0001487428hrzn:ControlledAffiliateMemberus-gaap:OtherLongTermInvestmentsMember2021-12-31 0001487428hrzn:UnrestrictedShortTermInvestmentsMember2021-12-31 0001487428hrzn:MoneyMarketFundsUnrestrictedInvestmentMember2021-12-31 0001487428hrzn:RestrictedShortTermInvestmentsMember2021-12-31 0001487428hrzn:MoneyMarketFundsRestrictedInvestmentsMember2021-12-31 0001487428hrzn:AssetsOfEsperoMember2022-10-222022-10-22 0001487428hrzn:PublicOfferingMember2022-03-142022-03-14 0001487428hrzn:PublicOfferingMember2022-03-14 0001487428hrzn:OneInvestmentMember2021-12-31 00014874282021-01-012021-12-31 0001487428hrzn:The2020EquityDistributionAgreementMember2020-07-30 0001487428hrzn:The2021EquityDistributionAgreementMember2021-08-02 0001487428hrzn:The2021EquityDistributionAgreementMember2022-07-012022-09-30 0001487428hrzn:The2020EquityDistributionAgreementAndThe2021EquityDistributionAgreementMember2021-07-012021-09-30 0001487428hrzn:The2021EquityDistributionAgreementMember2022-01-012022-09-30 0001487428hrzn:The2020EquityDistributionAgreementAndThe2021EquityDistributionAgreementMember2021-01-012021-09-30 0001487428hrzn:The2021EquityDistributionAgreementMember2022-09-30 00014874282022-04-29 00014874282022-04-302022-09-30 0001487428hrzn:InvestmentManagementAgreementMember2021-10-222021-10-22 0001487428hrzn:InvestmentManagementAgreementMember2022-09-30 0001487428hrzn:InvestmentManagementAgreementMember2021-12-31 0001487428hrzn:InvestmentManagementAgreementMember2022-07-012022-09-30 0001487428hrzn:InvestmentManagementAgreementMember2021-07-012021-09-30 0001487428hrzn:InvestmentManagementAgreementMember2022-01-012022-09-30 0001487428hrzn:InvestmentManagementAgreementMember2021-01-012021-09-30 0001487428hrzn:AdministrationAgreementMember2022-07-012022-09-30 0001487428hrzn:AdministrationAgreementMember2021-07-012021-09-30 0001487428hrzn:AdministrationAgreementMember2022-01-012022-09-30 0001487428hrzn:AdministrationAgreementMember2021-01-012021-09-30 0001487428us-gaap:DebtMember2022-09-30 0001487428us-gaap:DebtMember2021-12-31 0001487428us-gaap:WarrantMember2022-09-30 0001487428us-gaap:WarrantMember2021-12-31 0001487428us-gaap:OtherDebtSecuritiesMember2022-09-30 0001487428us-gaap:OtherDebtSecuritiesMember2021-12-31 0001487428us-gaap:EquitySecuritiesMember2022-09-30 0001487428us-gaap:EquitySecuritiesMember2021-12-31 0001487428hrzn:BiotechnologySectorMember2022-09-30 0001487428hrzn:BiotechnologySectorMember2021-12-31 0001487428hrzn:MedicalDeviceSectorMember2022-09-30 0001487428hrzn:MedicalDeviceSectorMember2021-12-31 0001487428hrzn:CommunicationsSectorMember2022-09-30 0001487428hrzn:CommunicationsSectorMember2021-12-31 0001487428hrzn:ConsumerrelatedSectorMember2022-09-30 0001487428hrzn:ConsumerrelatedSectorMember2021-12-31 0001487428hrzn:DataStorageSectorMember2022-09-30 0001487428hrzn:DataStorageSectorMember2021-12-31 0001487428hrzn:InternetAndMediaSectorMember2022-09-30 0001487428hrzn:InternetAndMediaSectorMember2021-12-31 0001487428hrzn:NetworkingSectorMember2022-09-30 0001487428hrzn:NetworkingSectorMember2021-12-31 0001487428hrzn:PowerManagementSectorMember2022-09-30 0001487428hrzn:PowerManagementSectorMember2021-12-31 0001487428hrzn:SemiconductorSectorMember2022-09-30 0001487428hrzn:SemiconductorSectorMember2021-12-31 0001487428hrzn:SoftwareSectorMember2022-09-30 0001487428hrzn:SoftwareSectorMember2021-12-31 0001487428hrzn:OtherSustainabilitySectorMember2022-09-30 0001487428hrzn:OtherSustainabilitySectorMember2021-12-31 0001487428hrzn:DiagnosticsSectorMember2022-09-30 0001487428hrzn:DiagnosticsSectorMember2021-12-31 0001487428hrzn:OtherSectorMember2022-09-30 0001487428hrzn:OtherSectorMember2021-12-31 0001487428hrzn:SoftwareHealthcareInformationAndServiceMember2022-09-30 0001487428hrzn:SoftwareHealthcareInformationAndServiceMember2021-12-31 0001487428hrzn:FirstDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2020-12-31 0001487428hrzn:FirstDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-01-012021-12-31 0001487428hrzn:FirstDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-12-31 0001487428hrzn:SecondDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2020-12-31 0001487428hrzn:SecondDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-01-012021-12-31 0001487428hrzn:SecondDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-12-31 0001487428hrzn:ThirdDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2020-12-31 0001487428hrzn:ThirdDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-01-012021-12-31 0001487428hrzn:ThirdDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-12-31 0001487428hrzn:FourthDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2020-12-31 0001487428hrzn:FourthDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-01-012021-12-31 0001487428hrzn:FourthDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-12-31 0001487428hrzn:FifthDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2020-12-31 0001487428hrzn:FifthDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-01-012021-12-31 0001487428hrzn:FifthDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-12-31 0001487428hrzn:SixthDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2020-12-31 0001487428hrzn:SixthDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-01-012021-12-31 0001487428hrzn:SixthDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-12-31 0001487428hrzn:SeventhDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2020-12-31 0001487428hrzn:SeventhDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-01-012021-12-31 0001487428hrzn:SeventhDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-12-31 0001487428hrzn:EighthDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2020-12-31 0001487428hrzn:EighthDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-01-012021-12-31 0001487428hrzn:EighthDecisyonIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-12-31 0001487428hrzn:FirstMVIABCLLCFkaStereovisionIncInvestmentMemberus-gaap:OtherAffiliatesMember2020-12-31 0001487428hrzn:FirstMVIABCLLCFkaStereovisionIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-01-012021-12-31 0001487428hrzn:FirstMVIABCLLCFkaStereovisionIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-12-31 0001487428hrzn:SecondMVIABCLLCFkaStereovisionIncInvestmentMemberus-gaap:OtherAffiliatesMember2020-12-31 0001487428hrzn:SecondMVIABCLLCFkaStereovisionIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-01-012021-12-31 0001487428hrzn:SecondMVIABCLLCFkaStereovisionIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-12-31 0001487428hrzn:ThirdMVIABCLLCFkaStereovisionIncInvestmentMemberus-gaap:OtherAffiliatesMember2020-12-31 0001487428hrzn:ThirdMVIABCLLCFkaStereovisionIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-01-012021-12-31 0001487428hrzn:ThirdMVIABCLLCFkaStereovisionIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-12-31 0001487428hrzn:FourthMVIABCLLCFkaStereovisionIncInvestmentMemberus-gaap:OtherAffiliatesMember2020-12-31 0001487428hrzn:FourthMVIABCLLCFkaStereovisionIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-01-012021-12-31 0001487428hrzn:FourthMVIABCLLCFkaStereovisionIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-12-31 0001487428hrzn:FifthMVIABCLLCFkaStereovisionIncInvestmentMemberus-gaap:OtherAffiliatesMember2020-12-31 0001487428hrzn:FifthMVIABCLLCFkaStereovisionIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-01-012021-12-31 0001487428hrzn:FifthMVIABCLLCFkaStereovisionIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-12-31 0001487428hrzn:SixthMVIABCLLCFkaStereovisionIncInvestmentMemberus-gaap:OtherAffiliatesMember2020-12-31 0001487428hrzn:SixthMVIABCLLCFkaStereovisionIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-01-012021-12-31 0001487428hrzn:SixthMVIABCLLCFkaStereovisionIncInvestmentMemberus-gaap:OtherAffiliatesMember2021-12-31 0001487428us-gaap:OtherAffiliatesMember2020-12-31 0001487428us-gaap:OtherAffiliatesMember2021-01-012021-12-31 0001487428us-gaap:OtherAffiliatesMember2021-12-31 0001487428hrzn:HESPLLCMember2021-12-31 0001487428hrzn:HESPLLCMember2022-01-012022-09-30 0001487428hrzn:HESPLLCMember2022-09-30 0001487428hrzn:ControlledAffiliateMember2021-12-31 0001487428hrzn:ControlledAffiliateMember2022-01-012022-09-30 0001487428hrzn:ControlledAffiliateMember2022-09-30 0001487428hrzn:HESPLLCMember2020-12-31 0001487428hrzn:HESPLLCMember2021-01-012021-12-31 0001487428hrzn:ControlledAffiliateMember2020-12-31 0001487428hrzn:ControlledAffiliateMember2021-01-012021-12-31 0001487428hrzn:MeasurementInputHypotheticalMarketYieldsMembersrt:MinimumMember2022-09-30 0001487428hrzn:MeasurementInputHypotheticalMarketYieldsMembersrt:MaximumMember2022-09-30 0001487428hrzn:MeasurementInputHypotheticalMarketYieldsMembersrt:MinimumMember2021-12-31 0001487428hrzn:MeasurementInputHypotheticalMarketYieldsMembersrt:MaximumMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:DebtMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:DebtMemberhrzn:HypotheticalMarketYieldMembersrt:MinimumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:DebtMemberhrzn:HypotheticalMarketYieldMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:DebtMemberhrzn:HypotheticalMarketYieldMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:DebtMemberhrzn:MultipleProbabilityWeightedCashFlowModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:DebtMemberhrzn:ProbabilityWeightingMemberhrzn:MultipleProbabilityWeightedCashFlowModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:DebtMemberhrzn:ProbabilityWeightingMembersrt:WeightedAverageMemberhrzn:MultipleProbabilityWeightedCashFlowModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberhrzn:BlackscholesValuationModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberus-gaap:MeasurementInputSharePriceMembersrt:MinimumMemberhrzn:BlackscholesValuationModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberus-gaap:MeasurementInputSharePriceMembersrt:MaximumMemberhrzn:BlackscholesValuationModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberus-gaap:MeasurementInputSharePriceMembersrt:WeightedAverageMemberhrzn:BlackscholesValuationModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberus-gaap:MeasurementInputPriceVolatilityMemberhrzn:BlackscholesValuationModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberus-gaap:MeasurementInputPriceVolatilityMembersrt:WeightedAverageMemberhrzn:BlackscholesValuationModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberhrzn:BlackscholesValuationModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMembersrt:WeightedAverageMemberhrzn:BlackscholesValuationModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberhrzn:EstimatedTimeToExitMembersrt:MinimumMemberhrzn:BlackscholesValuationModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberhrzn:EstimatedTimeToExitMembersrt:MaximumMemberhrzn:BlackscholesValuationModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberhrzn:EstimatedTimeToExitMembersrt:WeightedAverageMemberhrzn:BlackscholesValuationModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:OtherInvestmentsMemberhrzn:MultipleProbabilityWeightedCashFlowModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:OtherInvestmentsMemberus-gaap:MeasurementInputDiscountRateMemberhrzn:MultipleProbabilityWeightedCashFlowModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:OtherInvestmentsMemberus-gaap:MeasurementInputDiscountRateMembersrt:WeightedAverageMemberhrzn:MultipleProbabilityWeightedCashFlowModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:OtherInvestmentsMemberhrzn:ProbabilityWeightingMemberhrzn:MultipleProbabilityWeightedCashFlowModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:OtherInvestmentsMemberhrzn:ProbabilityWeightingMembersrt:WeightedAverageMemberhrzn:MultipleProbabilityWeightedCashFlowModelMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:EquitySecuritiesMemberhrzn:LastEquityFinancingMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:EquitySecuritiesMemberus-gaap:MeasurementInputSharePriceMembersrt:MinimumMemberhrzn:LastEquityFinancingMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:EquitySecuritiesMemberus-gaap:MeasurementInputSharePriceMembersrt:MaximumMemberhrzn:LastEquityFinancingMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:EquitySecuritiesMemberus-gaap:MeasurementInputSharePriceMembersrt:WeightedAverageMemberhrzn:LastEquityFinancingMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Member2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:DebtMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:DebtMemberhrzn:HypotheticalMarketYieldMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:DebtMemberhrzn:MultipleProbabilityWeightedCashFlowModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:DebtMemberhrzn:ProbabilityWeightingMembersrt:MinimumMemberhrzn:MultipleProbabilityWeightedCashFlowModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:DebtMemberhrzn:ProbabilityWeightingMembersrt:MaximumMemberhrzn:MultipleProbabilityWeightedCashFlowModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:DebtMemberhrzn:ProbabilityWeightingMembersrt:WeightedAverageMemberhrzn:MultipleProbabilityWeightedCashFlowModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberhrzn:BlackscholesValuationModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberus-gaap:MeasurementInputSharePriceMembersrt:MinimumMemberhrzn:BlackscholesValuationModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberus-gaap:MeasurementInputSharePriceMembersrt:MaximumMemberhrzn:BlackscholesValuationModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberus-gaap:MeasurementInputSharePriceMembersrt:WeightedAverageMemberhrzn:BlackscholesValuationModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberus-gaap:MeasurementInputPriceVolatilityMemberhrzn:BlackscholesValuationModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberus-gaap:MeasurementInputPriceVolatilityMembersrt:WeightedAverageMemberhrzn:BlackscholesValuationModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberhrzn:BlackscholesValuationModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMembersrt:WeightedAverageMemberhrzn:BlackscholesValuationModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberhrzn:EstimatedTimeToExitMembersrt:MinimumMemberhrzn:BlackscholesValuationModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberhrzn:EstimatedTimeToExitMembersrt:MaximumMemberhrzn:BlackscholesValuationModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMemberhrzn:EstimatedTimeToExitMembersrt:WeightedAverageMemberhrzn:BlackscholesValuationModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:OtherInvestmentsMemberhrzn:MultipleProbabilityWeightedCashFlowModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:OtherInvestmentsMemberus-gaap:MeasurementInputDiscountRateMemberhrzn:MultipleProbabilityWeightedCashFlowModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:OtherInvestmentsMemberus-gaap:MeasurementInputDiscountRateMembersrt:WeightedAverageMemberhrzn:MultipleProbabilityWeightedCashFlowModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:OtherInvestmentsMemberhrzn:ProbabilityWeightingMembersrt:WeightedAverageMemberhrzn:MultipleProbabilityWeightedCashFlowModelMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:EquitySecuritiesMemberhrzn:LastEquityFinancingMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:EquitySecuritiesMemberus-gaap:MeasurementInputSharePriceMembersrt:MinimumMemberhrzn:LastEquityFinancingMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:EquitySecuritiesMemberus-gaap:MeasurementInputSharePriceMembersrt:MaximumMemberhrzn:LastEquityFinancingMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:EquitySecuritiesMemberus-gaap:MeasurementInputSharePriceMembersrt:WeightedAverageMemberhrzn:LastEquityFinancingMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Member2021-12-31 0001487428hrzn:The2026NotesMember2022-09-30 0001487428hrzn:The2026NotesMemberus-gaap:FairValueInputsLevel2Member2022-09-30 0001487428hrzn:The2027NotesMember2022-09-30 0001487428hrzn:The2027NotesMemberus-gaap:FairValueInputsLevel1Member2022-09-30 0001487428hrzn:AssetbackedNotesMemberus-gaap:FairValueInputsLevel3Member2022-09-30 0001487428us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MoneyMarketFundsMember2022-09-30 0001487428us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MoneyMarketFundsMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MoneyMarketFundsMember2022-09-30 0001487428us-gaap:FairValueMeasurementsRecurringMemberus-gaap:MoneyMarketFundsMember2022-09-30 0001487428us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberhrzn:MoneyMarketFundsRestrictedInvestmentsMember2022-09-30 0001487428us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberhrzn:MoneyMarketFundsRestrictedInvestmentsMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberhrzn:MoneyMarketFundsRestrictedInvestmentsMember2022-09-30 0001487428us-gaap:FairValueMeasurementsRecurringMemberhrzn:MoneyMarketFundsRestrictedInvestmentsMember2022-09-30 0001487428us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:DebtMember2022-09-30 0001487428us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:DebtMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:DebtMember2022-09-30 0001487428us-gaap:FairValueMeasurementsRecurringMemberus-gaap:DebtMember2022-09-30 0001487428us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:WarrantMember2022-09-30 0001487428us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:WarrantMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:WarrantMember2022-09-30 0001487428us-gaap:FairValueMeasurementsRecurringMemberus-gaap:WarrantMember2022-09-30 0001487428us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherInvestmentsMember2022-09-30 0001487428us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherInvestmentsMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherInvestmentsMember2022-09-30 0001487428us-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherInvestmentsMember2022-09-30 0001487428us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2022-09-30 0001487428us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2022-09-30 0001487428us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2022-09-30 0001487428us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2022-09-30 0001487428us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2022-09-30 0001487428us-gaap:FairValueMeasurementsRecurringMember2022-09-30 0001487428us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MoneyMarketFundsMember2021-12-31 0001487428us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MoneyMarketFundsMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MoneyMarketFundsMember2021-12-31 0001487428us-gaap:FairValueMeasurementsRecurringMemberus-gaap:MoneyMarketFundsMember2021-12-31 0001487428us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberhrzn:MoneyMarketFundsRestrictedInvestmentsMember2021-12-31 0001487428us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberhrzn:MoneyMarketFundsRestrictedInvestmentsMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberhrzn:MoneyMarketFundsRestrictedInvestmentsMember2021-12-31 0001487428us-gaap:FairValueMeasurementsRecurringMemberhrzn:MoneyMarketFundsRestrictedInvestmentsMember2021-12-31 0001487428us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:DebtMember2021-12-31 0001487428us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:DebtMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:DebtMember2021-12-31 0001487428us-gaap:FairValueMeasurementsRecurringMemberus-gaap:DebtMember2021-12-31 0001487428us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:WarrantMember2021-12-31 0001487428us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:WarrantMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:WarrantMember2021-12-31 0001487428us-gaap:FairValueMeasurementsRecurringMemberus-gaap:WarrantMember2021-12-31 0001487428us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherInvestmentsMember2021-12-31 0001487428us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherInvestmentsMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherInvestmentsMember2021-12-31 0001487428us-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherInvestmentsMember2021-12-31 0001487428us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2021-12-31 0001487428us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2021-12-31 0001487428us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2021-12-31 0001487428us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-31 0001487428us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-31 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-31 0001487428us-gaap:FairValueMeasurementsRecurringMember2021-12-31 0001487428us-gaap:DebtMember2022-06-30 0001487428us-gaap:WarrantMember2022-06-30 0001487428us-gaap:EquitySecuritiesMember2022-06-30 0001487428us-gaap:OtherInvestmentsMember2022-06-30 0001487428us-gaap:DebtMember2022-07-012022-09-30 0001487428us-gaap:WarrantMember2022-07-012022-09-30 0001487428us-gaap:EquitySecuritiesMember2022-07-012022-09-30 0001487428us-gaap:OtherInvestmentsMember2022-07-012022-09-30 0001487428us-gaap:OtherInvestmentsMember2022-09-30 0001487428us-gaap:FairValueInputsLevel2Memberus-gaap:WarrantMember2022-07-012022-09-30 0001487428us-gaap:FairValueInputsLevel1Memberus-gaap:WarrantMember2022-07-012022-09-30 0001487428us-gaap:DebtMember2021-06-30 0001487428us-gaap:WarrantMember2021-06-30 0001487428us-gaap:EquitySecuritiesMember2021-06-30 0001487428us-gaap:OtherInvestmentsMember2021-06-30 0001487428us-gaap:DebtMember2021-07-012021-09-30 0001487428us-gaap:WarrantMember2021-07-012021-09-30 0001487428us-gaap:EquitySecuritiesMember2021-07-012021-09-30 0001487428us-gaap:OtherInvestmentsMember2021-07-012021-09-30 0001487428us-gaap:DebtMember2021-09-30 0001487428us-gaap:WarrantMember2021-09-30 0001487428us-gaap:EquitySecuritiesMember2021-09-30 0001487428us-gaap:OtherInvestmentsMember2021-09-30 0001487428us-gaap:OtherInvestmentsMember2021-12-31 0001487428us-gaap:DebtMember2022-01-012022-09-30 0001487428us-gaap:WarrantMember2022-01-012022-09-30 0001487428us-gaap:EquitySecuritiesMember2022-01-012022-09-30 0001487428us-gaap:OtherInvestmentsMember2022-01-012022-09-30 0001487428us-gaap:FairValueInputsLevel2Memberus-gaap:WarrantMember2022-01-012022-09-30 0001487428us-gaap:FairValueInputsLevel1Memberus-gaap:WarrantMember2022-01-012022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:DebtMember2022-01-012022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMember2022-01-012022-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:EquitySecuritiesMember2022-01-012022-09-30 0001487428us-gaap:DebtMember2020-12-31 0001487428us-gaap:WarrantMember2020-12-31 0001487428us-gaap:EquitySecuritiesMember2020-12-31 0001487428us-gaap:OtherInvestmentsMember2020-12-31 0001487428us-gaap:DebtMember2021-01-012021-09-30 0001487428us-gaap:WarrantMember2021-01-012021-09-30 0001487428us-gaap:EquitySecuritiesMember2021-01-012021-09-30 0001487428us-gaap:OtherInvestmentsMember2021-01-012021-09-30 0001487428us-gaap:FairValueInputsLevel2Memberus-gaap:WarrantMember2021-01-012021-09-30 0001487428us-gaap:FairValueInputsLevel1Memberus-gaap:EquitySecuritiesMember2021-01-012021-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:DebtMember2021-01-012021-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:WarrantMember2021-01-012021-09-30 0001487428us-gaap:FairValueInputsLevel3Memberus-gaap:EquitySecuritiesMember2021-01-012021-09-30 0001487428hrzn:KeyFacilityMember2022-09-30 0001487428hrzn:KeyFacilityMember2021-12-31 0001487428hrzn:NYLFacilityMember2022-09-30 0001487428hrzn:NYLFacilityMember2021-12-31 0001487428hrzn:AssetbackedNotesMember2022-09-30 0001487428hrzn:AssetbackedNotesMember2021-12-31 0001487428hrzn:The2027NotesMember2021-12-31 0001487428hrzn:The2026NotesMember2021-12-31 0001487428srt:MinimumMember2022-01-012022-09-30 0001487428hrzn:KeyFacilityMember2021-06-22 0001487428hrzn:KeyFacilityMemberus-gaap:LondonInterbankOfferedRateLIBORMember2021-06-222021-06-22 0001487428hrzn:KeyFacilityMembersrt:MinimumMemberus-gaap:LondonInterbankOfferedRateLIBORMember2021-06-222021-06-22 0001487428hrzn:KeyFacilityMemberus-gaap:PrimeRateMember2022-01-012022-09-30 0001487428hrzn:KeyFacilityMembersrt:MinimumMemberus-gaap:PrimeRateMember2022-01-012022-09-30 0001487428hrzn:KeyFacilityMemberus-gaap:PrimeRateMember2022-09-30 0001487428hrzn:KeyFacilityMemberus-gaap:PrimeRateMember2021-12-31 0001487428hrzn:KeyFacilityMember2022-07-012022-09-30 0001487428hrzn:KeyFacilityMember2021-07-012021-09-30 0001487428hrzn:KeyFacilityMember2022-01-012022-09-30 0001487428hrzn:KeyFacilityMember2021-01-012021-09-30 0001487428hrzn:The625NotesDue2022Member2017-09-29 0001487428hrzn:Adittional2022NotesMember2017-10-11 0001487428hrzn:The2022NotesMember2019-09-15 0001487428hrzn:The2022NotesMember2021-04-242021-04-24 0001487428hrzn:The2026NotesMember2021-03-30 0001487428hrzn:The2026NotesUnderwriterOptionMember2021-03-30 0001487428hrzn:The2027NotesMember2022-06-15 0001487428hrzn:The2027NotesUnderwriterOptionMember2022-06-15 0001487428us-gaap:MoneyMarketFundsMember2022-09-30 0001487428us-gaap:MoneyMarketFundsMember2021-12-31 0001487428hrzn:NYLFacilityMember2020-04-21 0001487428hrzn:NYLFacilityMembersrt:MinimumMemberhrzn:USDMidmarketWwapRateMember2020-04-212020-04-21 0001487428hrzn:NYLFacilityMembersrt:MaximumMemberhrzn:USDMidmarketWwapRateMember2020-04-212020-04-21 0001487428hrzn:NYLFacilityMember2022-02-252022-02-25 0001487428hrzn:NYLFacilityMember2022-02-25 0001487428hrzn:NYLFacilityMemberhrzn:USDMidmarketWwapRateMember2022-02-252022-02-25 0001487428us-gaap:CommitmentsToExtendCreditMember2022-09-30 0001487428us-gaap:CommitmentsToExtendCreditMember2021-12-31 0001487428hrzn:BetterPlaceForestsCoMember2022-09-30 0001487428hrzn:BrightinsightIncMember2022-09-30 0001487428hrzn:BritecoreHoldingsIncMember2022-09-30 0001487428hrzn:CanaryMedicalIncMember2022-09-30 0001487428hrzn:CastleCreekBiosciencesMember2022-09-30 0001487428hrzn:CeribellIncMember2022-09-30 0001487428hrzn:DivergentTechnologiesIncMember2022-09-30 0001487428hrzn:DropOffIncMember2022-09-30 0001487428hrzn:EmbodyIncMember2022-09-30 0001487428hrzn:Engage3LLCMember2022-09-30 0001487428hrzn:HoundLabsIncMember2022-09-30 0001487428hrzn:InteriorDefineIncMember2022-09-30 0001487428hrzn:KSQTherapeuticsIncMember2022-09-30 0001487428hrzn:LyticsIncMember2022-09-30 0001487428hrzn:MagnoliaMedicalTechnologiesIncMember2022-09-30 0001487428hrzn:NativeMicrobialsIncMember2022-09-30 0001487428hrzn:OptoroIncMember2022-09-30 0001487428hrzn:PdsBiotechnologyCorporationMember2022-09-30 0001487428hrzn:ScientiaVascularIncMember2022-09-30 0001487428hrzn:SlingshotAerospaceIncMember2022-09-30 0001487428hrzn:SoliIncMember2022-09-30 0001487428hrzn:SonexHealthIncMember2022-09-30 0001487428hrzn:SwiftHealthSystemsIncMember2022-09-30 0001487428hrzn:TemperpackTechnologiesIncMember2022-09-30 0001487428hrzn:DebtInvestmentsMemberhrzn:InvestmentConcentrationRiskMemberhrzn:FiveLargestDebtInvestmentsMember2022-01-012022-09-30 0001487428hrzn:DebtInvestmentsMemberhrzn:InvestmentConcentrationRiskMemberhrzn:FiveLargestDebtInvestmentsMember2021-01-012021-12-31 0001487428hrzn:DebtInvestmentsMemberhrzn:InvestmentIncomeConcentrationRiskMemberhrzn:FiveLargestDebtInvestmentsMember2022-07-012022-09-30 0001487428hrzn:DebtInvestmentsMemberhrzn:InvestmentIncomeConcentrationRiskMemberhrzn:FiveLargestDebtInvestmentsMember2021-07-012021-09-30 0001487428hrzn:DebtInvestmentsMemberhrzn:InvestmentIncomeConcentrationRiskMemberhrzn:FiveLargestDebtInvestmentsMember2022-01-012022-09-30 0001487428hrzn:DebtInvestmentsMemberhrzn:InvestmentIncomeConcentrationRiskMemberhrzn:FiveLargestDebtInvestmentsMember2021-01-012021-09-30 0001487428hrzn:First7292022DividendMember2022-01-012022-09-30 0001487428hrzn:Second7292022DividendMember2022-01-012022-09-30 0001487428hrzn:Third7292022DividendMember2022-01-012022-09-30 0001487428hrzn:First42922DividendMember2022-01-012022-09-30 0001487428hrzn:Second4292022DividendMember2022-01-012022-09-30 0001487428hrzn:Third4292022DividendMember2022-01-012022-09-30 0001487428hrzn:First2252022DividendMember2022-01-012022-09-30 0001487428hrzn:Second2252022DividendMember2022-01-012022-09-30 0001487428hrzn:Third2252022DividendMember2022-01-012022-09-30 0001487428hrzn:First102221DividendMember2021-01-012021-12-31 0001487428hrzn:Second102221DividendMember2021-01-012021-12-31 0001487428hrzn:Third102221DividendMember2021-01-012021-12-31 0001487428hrzn:Fourth102221DividendMember2021-01-012021-12-31 0001487428hrzn:First72321DividendMember2021-01-012021-12-31 0001487428hrzn:Second72321DividendMember2021-01-012021-12-31 0001487428hrzn:Third72321DividendMember2021-01-012021-12-31 0001487428hrzn:First42321DividendMember2021-01-012021-12-31 0001487428hrzn:Second42321DividendMember2021-01-012021-12-31 0001487428hrzn:Third42321DividendMember2021-01-012021-12-31 0001487428hrzn:First22621DividendMember2021-01-012021-12-31 0001487428hrzn:Second22621DividendMember2021-01-012021-12-31 0001487428hrzn:Third22621DividendMember2021-01-012021-12-31 0001487428hrzn:DividendPaidJanuary132023Member2022-10-282022-10-28 0001487428hrzn:DividendPaidFebruary152023Member2022-10-282022-10-28 0001487428hrzn:DividendPaidMarch152023Member2022-10-282022-10-28 0001487428hrzn:DividendPaidDecember152022Member2022-10-282022-10-28 0001487428hrzn:EmalexBiosciencesIncMemberus-gaap:EquitySecuritiesMemberus-gaap:SubsequentEventMember2022-10-212022-10-21