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Note 3 - Related Party Transactions (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Oct. 21, 2024
Management Fee Payable	$ 1,045	$ 1,052
Management Fee Expense	12,261	12,799	$ 10,566
Administrative Fees Expense	$ 1,650	1,658	1,667
Equity Purchase Agreement [Member] | Monroe [Member] | Momentum US Bidco LLC [Member]
Ownership Percentage				75.00%
Equity Purchase Agreement [Member] | MCH HoldCo [Member] | Momentum US Bidco LLC [Member]
Ownership Percentage				100.00%
Equity Purchase Agreement [Member] | Horizon Technology Finance Management LLC (the Advisor) [Member] | Momentum US Bidco LLC [Member]
Ownership Percentage				100.00%
Equity Purchase Agreement [Member] | Monroe Capital Intermediate Holdings, LLC [Member] | Momentum US Bidco LLC [Member]
Ownership Percentage				75.00%
Investment Management Agreement [Member]
Base Management Fee, Annual, Percent	2.00%
Base Management Fee, Annual, Percent, Gross Assets Exceeding $250 Million	1.60%
Management Fee Payable	$ 1,000	1,100
Management Fee Expense	$ 12,300	12,800	10,600
Incentive Fee to Pre-incentive Net Investment Income	20.00%
Pre-Incentive Fee Net Investment Income, Hurdle Rate	1.75%
Pre-Incentive Fee Net Investment Income, Hurdle Rate, Annualized	7.00%
Pre-Incentive Fee Net Investment Income, Catch-up, Percent	100.00%
Pre-Incentive Fee Net Investment Income, Maximum Rate to Trigger Catch-up	2.1875%
Pre-Incentive Fee Net Investment Income, Maximum Rate to Trigger Catch-up, Annualized	8.75%
Incentive Fee Expense	$ 300	3,100	7,700
Incentive Fee Cap and Deferral Mechanism Reduction to Expense	9,300	9,800	1,000
Incentive Fee Payable	0	0
Administration Agreement [Member]
Administrative Fees Expense	1,700	1,700	$ 1,700
Administrative Fees Payable	$ 400	$ 400

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