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Consolidated Schedule of Investments (Unaudited) (Details Textual) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024 | Nov. 09, 2022
--- | --- | --- | ---
Debt Instrument, Face Amount | $ 700,008 | $ 716,078 |
Investment, Affiliated Issuer, Controlled [Member] | HIMV LLC [Member] | Co-lender [Member] |  |  |
Investment Owned, Net Assets, Percentage | 30.00% |  |
Horizon Technology Finance Corporation [Member] | Investment, Affiliated Issuer, Controlled [Member] | HIMV LLC [Member] |  |  |
Investment Owned, Net Assets, Percentage | 70.00% |  |
Asset-backed Notes 2022 [Member] |  |  |
Debt Instrument, Face Amount | $ 65,008 | $ 81,078 | $ 157,800
Asset-backed Notes 2022 [Member] | Affiliated Entity [Member] |  |  |
Debt Instrument, Face Amount |  |  | $ 100,000

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