Annual report pursuant to Section 13 and 15(d)

BORROWINGS - Schedule of Line of Credit Facilities (Details)

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BORROWINGS - Schedule of Line of Credit Facilities (Details) - USD ($)
12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Aug. 10, 2020
Aug. 09, 2020
Debt Instrument [Line Items]          
Borrowings outstanding at cost $ 35,200,000 $ 0      
Credit Facility | Revolving Line of Credit | Line of Credit          
Debt Instrument [Line Items]          
Commitment amount 180,000,000 180,000,000   $ 180,000,000 $ 200,000,000
Borrowings outstanding at cost 35,200,000 0      
Availability 144,800,000 180,000,000      
Weighted-average borrowings outstanding $ 16,186,000 $ 18,051,000 $ 82,632,000    
Effective interest rate 17.30% 12.50% 4.30%    
Commitment (unused) fees incurred $ 1,655,000 $ 1,641,000 $ 819,000    
Adjusted availability $ 144,800,000 $ 180,000,000