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Consolidated Schedule of Investments (Unaudited) (Details Textual) - USD ($) $ in Thousands	Aug. 06, 2025	Sep. 30, 2025	Aug. 05, 2025	Dec. 31, 2024	Nov. 09, 2022
Debt Instrument, Face Amount		$ 757,750		$ 716,078
HIMV LLC [Member]
Subsidiary, Ownership Percentage, Parent	100.00%
HIMV LLC [Member] | Co-lender [Member]
Subsidiary, Ownership Percentage, Noncontrolling Owner			30.00%
Horizon Technology Finance Corporation [Member] | HIMV LLC [Member]
Subsidiary, Ownership Percentage, Parent			70.00%
Asset-backed Notes 2022 [Member]
Debt Instrument, Face Amount		$ 0		$ 81,078	$ 157,800
Asset-backed Notes 2022 [Member] | Affiliated Entity [Member]
Debt Instrument, Face Amount					$ 100,000
Assets of Powerscourt Investments XXV, LP [Member]
Asset Acquisition, Consideration Transferred	$ 22,500
Fair Value of Assets Acquired	36,500
Assets of Powerscourt Investments XXV, LP [Member] | Debt Securities [Member]
Fair Value of Assets Acquired	$ 34,900

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