v3.25.2
Borrowings - Details 2 (Details) - USD ($)
 3 Months Ended 12 Months Ended
Apr. 26, 2023
Apr. 14, 2023
Mar. 31, 2023
Aug. 31, 2021
Feb. 07, 2020
Dec. 21, 2019
May 31, 2025
May 31, 2024
Feb. 28, 2025
Nov. 30, 2024
Feb. 29, 2024
May 01, 2023
Jul. 14, 2022
Line of Credit Facility [Line Items]                          
Interest expense             $ 12,451,865 $ 12,962,081          
Amortization of deferred financing               200,000          
Amortization of premium on issuance               0.2          
Outstanding borrowings             32,400,000 12,900,000          
Financing costs             875,791          
Aggregate amount indebtedness                 $ 1,000        
Debt instrument, redemption amount       $ 60,000,000 $ 24,450,000 $ 50,000,000              
8.75% 2025 Notes [Member]                          
Line of Credit Facility [Line Items]                          
Aggregate principal amount     $ 10,000,000                    
Net proceeds amount     9,700,000       9,700,000            
Deducting underwriting commissions amount     $ 400,000       400,000            
Outstanding amount             $ 10,000,000            
Deferred financing costs                       $ 30,000.00  
Debt instrument, description             Interest on the 8.75% 2025 Notes is paid quarterly in arrears on February 28, May 31, August 31 and November 30, at a rate of 8.75% per year. On February 2, 2024, pursuant to the terms of the indenture governing the 8.75% 2025 Notes, the Company elected to exercise its option to extend the maturity date of the 8.75% 2025 Notes from March 31, 2024 to March 31, 2025. Net proceeds from this offering were used to make investments in middle-market companies (including investments made through the SBIC Subsidiaries) in accordance with the Company’s investment objective and strategies and general corporate purposes. Financing costs and discounts of $0.7 million related to the 8.75% 2025 Notes have been capitalized and are being amortized over the term of the 8.75% 2025 Notes.            
Aggregate principal amount             $ 20,000,000            
Interest expense             100,000 400,000          
Amortization of deferred financing               30,000.00          
Amortization of premium on issuance             $ 10,000.00 30,000.00          
Debt instrument, interest rate, stated percentage             8.75%            
8.50% 2028 Notes [Member]                          
Line of Credit Facility [Line Items]                          
Aggregate principal amount $ 7,500,000 $ 50,000,000                      
Net proceeds amount 7,300,000 48,400,000                      
Deducting underwriting commissions amount   1,600,000                      
Outstanding amount $ 200,000                        
Deferred financing costs             $ 30,000.00            
Interest expense             $ 1,200,000 1,200,000          
Amortization of deferred financing               100,000          
Financing costs   $ 2,000,000                      
Par value, per share (in Dollars per share)             $ 25            
Outstanding fair value             $ 57,500,000 57,800,000          
Carrying amount                     $ 5,000,000    
Fair value                     $ 5,000,000    
Debt instrument, interest rate, stated percentage             8.50%            
SBA Debentures [Member]                          
Line of Credit Facility [Line Items]                          
Debt instrument, interest rate, stated percentage                 150.00%        
Notes One [Member]                          
Line of Credit Facility [Line Items]                          
Aggregate principal amount                   $ 74,450,000      
7.25% 2025 Notes [Member]                          
Line of Credit Facility [Line Items]                          
Aggregate principal amount                         $ 43,100,000
8.75% 2025 Notes [Member]                          
Line of Credit Facility [Line Items]                          
Outstanding borrowings             $ 6,500,000 20,000,000          
8.50% 2028 Notes [Member]                          
Line of Credit Facility [Line Items]                          
Outstanding borrowings             57,500,000 $ 57,500,000          
8.75% 2025 Notes [Member]                          
Line of Credit Facility [Line Items]                          
Amortization of deferred financing             $ 100,000            
Minimum [Member] | 8.75% 2025 Notes [Member]                          
Line of Credit Facility [Line Items]                          
Carrying amount                 $ 57,500,000        
Maximum [Member] | 8.75% 2025 Notes [Member]                          
Line of Credit Facility [Line Items]                          
Fair value                 $ 58,300,000