XML 54 R48.htm IDEA: XBRL DOCUMENT v3.25.3
Debt - Additional Information (Details) - USD ($)
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
May 21, 2025
Mar. 19, 2025
Aug. 17, 2022
Oct. 08, 2021
Dec. 23, 2020
Jun. 26, 2020
Apr. 24, 2019
Sep. 30, 2025
Sep. 30, 2024
Jun. 30, 2025
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Jul. 25, 2024
Jun. 30, 2024
Debt Instrument [Line Items]                              
Debt instrument asset coverage percentage                     301.50%   312.40%    
Aggregate principal amount               $ 191,000,000     $ 191,000,000   $ 175,000,000    
Weighted average interest rate               4.857% 4.647%   4.857% 4.647%      
Net proceeds from the notes                     $ 100,000,000        
Offering expenses               $ 10,266,000     10,266,000   8,785,000    
Loss on extinguishment of debt               (304,000) $ 0   (630,000) $ (521,000)      
Secured borrowings               12,816,000     12,816,000   13,674,000    
Aggregate amount of outstanding of senior securities                     352,816,000   308,674,000    
Fair value of loans included in investments               $ 12,734,000     $ 12,734,000   13,505,000    
Credit facility, interest rate per annum                     1.092% 0.696%      
SBA Debentures                              
Debt Instrument [Line Items]                              
Weighted average interest rate               4.139% 4.316%   4.139% 4.316%      
Offering expenses               $ 6,028,000     $ 6,028,000   6,101,000    
Prepayment of debentures               16,500,000 $ 0   $ 28,500,000 $ 35,000,000      
Debt instrument, maturity year range, start                     2032 2026      
Debt instrument, maturity year range, end                     2033 2027      
Loss on extinguishment of debt               (304,000) $ 0   $ (630,000) $ (521,000)      
Debt instrument term                     10 years        
Interest rate payment term                     semi-annually on March 1 and September 1        
Unused commitments amount               $ 130,500,000     $ 130,500,000   $ 175,000,000    
Secured Borrowings                              
Debt Instrument [Line Items]                              
Weighted average interest rate               8.242% 8.915%   8.242% 8.915% 8.60%    
4.75% Notes due 2026                              
Debt Instrument [Line Items]                              
Maturity date         Jan. 31, 2026                    
Aggregate principal amount $ 125,000,000       $ 125,000,000                    
Interest rate         4.75%                    
Net proceeds from the notes         $ 122,134,000                    
Underwriting discounts         $ 2,500,000                    
Percentage of public offering price         100.00%                    
Offering expenses         $ 366,000                    
Loss on extinguishment of debt 75,000                            
Debt instrument, redemption description                     The January 2026 Notes may be redeemed in whole or in part at any time or from time to time at our option subject to a make whole provision if redeemed before October 31, 2025 (the date falling three months prior to maturity) and at par thereafter. Interest on the January 2026 Notes is payable on January 31 and July 31 of each year. The Company does not intend to list the January 2026 Notes on any securities exchange or automated dealer quotation system.        
Debt instrument redemption of aggregate principal amount $ 25,000,000                            
3.50% Notes Due 2026                              
Debt Instrument [Line Items]                              
Maturity date       Nov. 15, 2026                      
Aggregate principal amount       $ 125,000,000                      
Interest rate       3.50%                      
Net proceeds from the notes       $ 122,177,000                      
Underwriting discounts       $ 2,500,000                      
Percentage of public offering price       99.996%                      
Offering expenses       $ 318,000                      
Debt instrument, redemption description                     The November 2026 Notes may be redeemed in whole or in part at any time or from time to time at our option subject to a make whole provision if redeemed before August 15, 2026 (the date falling three months prior to maturity) and at par thereafter. Interest on the November 2026 Notes is payable on May 15 and November 15 of each year. The Company does not intend to list the November 2026 Notes on any securities exchange or automated dealer quotation system.        
6.75% Notes Due 2030                              
Debt Instrument [Line Items]                              
Maturity date   Mar. 19, 2030                          
Aggregate principal amount   $ 100,000,000                          
Interest rate   6.75%                          
Net proceeds from the notes   $ 96,998,000                          
Underwriting discounts   $ 2,000,000                          
Percentage of public offering price   99.29954%                          
Offering expenses   $ 302,000                          
Debt instrument, redemption description                   The March 2030 Notes may be redeemed in whole or in part at any time or from time to time at our option subject to a make whole provision if redeemed before September 19, 2029 (the date falling six months prior to maturity) and at par thereafter. Interest on the March 2030 Notes is payable on March 19 and September 19 of each year, beginning September 19, 2025. The Company does not intend to list the March 2030 Notes on any securities exchange or automated dealer quotation system.          
2026 Notes                              
Debt Instrument [Line Items]                              
Debt instrument redemption of issued and outstanding amount               $ 0     $ 25,000,000        
Revolving Credit Facility | Revolving Credit Agreement | ING Capital LLC                              
Debt Instrument [Line Items]                              
Maturity date     Aug. 17, 2027     Apr. 24, 2023                  
Interest rate prior to certain conditions satisfied     3.00%     2.675%                  
Interest rate after certain conditions satisfied     2.675%     2.50%                  
Asset coverage ratio     1.50%     2.00%                  
Senior asset coverage ratio     2.00%                        
Remaining unused portion of Credit Facility commitment percentage             0.50%                
Performing first lien bank loans, minimum percentage             35.00%                
Credit Facility commitment                           $ 140,000,000 $ 100,000,000
Revolving Credit Facility | Revolving Credit Agreement | ING Capital LLC | Maximum                              
Debt Instrument [Line Items]                              
Credit facility, interest rate per annum             2.675%                
Credit facility commitment percentage             35.00%                
Revolving Credit Facility | Revolving Credit Agreement | ING Capital LLC | Minimum                              
Debt Instrument [Line Items]                              
Credit facility, interest rate per annum             2.50%