v3.26.3
Borrowings - Details 1 (Details) - USD ($)
 3 Months Ended 6 Months Ended
Nov. 06, 2025
Apr. 04, 2022
Aug. 31, 2026
Aug. 31, 2025
Aug. 31, 2026
Aug. 31, 2025
Feb. 28, 2026
Mar. 23, 2018
Borrowings [Line Items]                
Employ leverage, percentage         200.00%      
Asset coverage ratio     171.90%   171.90%   168.40%  
Borrowings outstanding     $ 822,900,000 $ 788,400,000 $ 809,800,000 $ 790,600,000    
Weighted average interest rate     6.11% 5.57% 6.12% 5.58%    
Percentage of credit facility         0.75%      
Administrative agent fee     $ 1,350,000 $ 1,283,333 $ 2,700,000 $ 2,533,333    
Ratio of advances outstanding         0.50%      
Percentage of aggregate commitments         50.00%      
Interest expense     14,061,404 12,372,030 $ 27,711,687 $ 24,823,895    
Deferred financing costs     0 100,000        
Floating rate per annum percentage         37.50% 37.50%    
1940 [Member]                
Borrowings [Line Items]                
Employ leverage, percentage         150.00%      
Encina Credit Facility [Member]                
Borrowings [Line Items]                
Percentage of credit facility   50.00%            
Credit facility balance, description         increased the borrowings available under the Encina Credit Facility from up to $50.0 million to up to $65.0 million; (ii) changed the underlying benchmark used to compute interest under the Encina Credit Agreement from LIBOR to Term SOFR for a one-month tenor plus a 0.10% credit spread adjustment; (iii) increased the applicable effective margin rate on borrowings from 4.00% to 4.25%; (iv) extended the revolving period from October 4, 2024 to January 27, 2026; (v) extended the period during which the borrower may request one or more increases in the borrowings available under the Encina Credit Facility (each such increase, a “Facility Increase”) from October 4, 2023 to January 27, 2025, and increased the maximum borrowings available pursuant to the Encina Facility Increase from $75.0 million to $150.0 million; (vi) revised the eligibility criteria for eligible collateral loans to exclude certain industries in which an obligor or related guarantor may be involved; and (vii) amended the provisions permitting the borrower to request an extension in the Commitment Termination Date (as defined in the Encina Credit Agreement) to allow requests to extend any applicable Commitment Termination Date, rather than a one-time request to extend the original Commitment Termination Date, subject to a notice requirement.      
Administrative agent fee         $ 100,000      
Line of credit facility, borrowing capacity, description         Availability on the Encina Credit Facility was subject to a borrowing base calculation, based on, among other things, applicable advance rates (which varied from 50.0% to 75.0% of par or fair value depending on the type of loan asset) and the value of certain “eligible” loan assets included as part of the borrowing base. Funds could be borrowed at the prevailing one-month SOFR rate, plus an applicable effective margin of 4.25%.      
Outstanding borrowings     0   $ 0   $ 0  
Realized loss on extinguishment of debt $ 100,000              
Interest expense     $ 0 $ 800,000        
Deferred financing costs         0 $ 200,000    
Floating rate per annum percentage     0.00% 8.90%        
Outstanding borrowings     $ 0 $ 32,500,000 $ 0 $ 32,500,000    
Minimum [Member]                
Borrowings [Line Items]                
Asset coverage ratio               150.00%
Credit facility   $ 12,500,000            
Maximum [Member]                
Borrowings [Line Items]                
Credit facility   $ 25,000,000