Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)

v3.24.3
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
$ in Thousands
 12 Months Ended
Apr. 04, 2024
Sep. 30, 2024
USD ($)
loan
investment
Sep. 30, 2023
USD ($)
loan
investment
Sep. 30, 2022
USD ($)
Summary of Investment Holdings [Line Items]        
Reverse stock split, conversion ratio 0.5      
Cost   $ 771,011 [1] $ 722,269 [2]  
Fair Value   796,260 [1] 704,815 [2]  
Total interest income (excluding PIK interest income)   87,618 79,480 $ 49,759
PIK interest income   $ 5,676 3,550 4,229
Investment company, target percentage of taxable income to distribute to shareholders (up to)   100.00%    
OID        
Summary of Investment Holdings [Line Items]        
Fair Value   $ 600 $ 700  
Number of loans | loan   2 4  
Total interest income (excluding PIK interest income)   $ 400 $ 200 500
PIK        
Summary of Investment Holdings [Line Items]        
Number of investments | investment   8 8  
Proceeds from interest received   $ 200 $ 1,100 $ 2,400
B+T Group Acquisition, Inc., Edge Adhesives Holdings, Inc,. And WB Xcel Holdings, LLC        
Summary of Investment Holdings [Line Items]        
Cost   $ 28,300    
Cost percentage   4.10%    
Fair Value   $ 12,800    
Fair value percentage   1.90%    
Edge Adhesives Holdings, Inc.        
Summary of Investment Holdings [Line Items]        
Cost     $ 6,100  
Cost percentage     0.90%  
Fair Value     $ 2,900  
Fair value percentage     0.50%  
[1] Cumulative gross unrealized depreciation for federal income tax purposes is $66.1 million; cumulative gross unrealized appreciation for federal income tax purposes is $85.8 million. Cumulative net unrealized appreciation is $19.7 million, based on a tax cost of $776.5 million.
[2] Cumulative gross unrealized depreciation for federal income tax purposes is $56.9 million; cumulative gross unrealized appreciation for federal income tax purposes is $33.7 million. Cumulative net unrealized depreciation is $23.2 million, based on a tax cost of $728.0 million.