Annual report pursuant to Section 13 and 15(d)

SUBSEQUENT EVENTS - Narrative (Details)

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SUBSEQUENT EVENTS - Narrative (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Nov. 13, 2024
Oct. 31, 2024
Apr. 30, 2024
Feb. 29, 2024
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2022
Subsequent Event [Line Items]              
Purchase of investments         $ 177,649 $ 175,477 $ 274,898
Perimeter Solutions Group              
Subsequent Event [Line Items]              
Purchase of investments       $ 15,000      
Perimeter Solutions Group | Subsequent Event              
Subsequent Event [Line Items]              
Net proceeds from the sale of investments   $ 15,500          
Investment company, prepayment fee   500          
Antenna Research Associates, Inc | Subsequent Event              
Subsequent Event [Line Items]              
Net proceeds from the sale of investments   31,300          
Realized investment gains   $ 59,300          
Home Healthcare, LLC ("Giving Home")              
Subsequent Event [Line Items]              
Net proceeds from the sale of investments     $ 29,700        
Investment company, prepayment fee     $ 900        
Home Healthcare, LLC ("Giving Home") | Subsequent Event              
Subsequent Event [Line Items]              
Purchase of investments $ 28,900