v3.25.4
Note 3 - Related Party Transactions (Details Textual) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Management Fee Payable   $ 975 $ 1,045  
Management Fee Expense   11,741 12,261 $ 12,799
Administrative Fees Expense   $ 1,519 1,650 1,658
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 1,000  
Management Fee Expense   11,700 12,300 12,800
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   0 300 3,100
Incentive Fee Cap and Deferral Mechanism Reduction to Expense   8,900 9,300 9,800
Investment Company, Incentive Fee Waived   0    
Incentive Fee Payable   0 0  
Administration Agreement [Member]        
Administrative Fees Expense   1,500 1,700 $ 1,700
Administrative Fees Payable   300 $ 400  
Merger Agreement Fee Waiver [Member]        
Investment Company, Contractual and Voluntary Fees Waived   4,000    
Base Management and Incentive Fees, Amount Waived per Quarter   $ 1,000