Annual report pursuant to Section 13 and 15(d)

BORROWINGS - Fair Value Narrative (Details)

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BORROWINGS - Fair Value Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 10, 2020
Mar. 31, 2023
Mar. 31, 2022
Debt Instrument [Line Items]      
Investments owned, fair value   $ 753,543 [1] $ 714,396 [2]
Collateral Pledged      
Debt Instrument [Line Items]      
Investments owned, fair value   $ 639,500 $ 537,500
Credit Facility | Line of Credit      
Debt Instrument [Line Items]      
Unused fee percentage   1.00% 1.00%
Credit Facility | Revolving Line of Credit | Line of Credit | LIBOR      
Debt Instrument [Line Items]      
Debt instrument, variable rate floor 0.50% 0.50% 0.50%
Debt instrument, basis spread on variable rate   2.94% 2.85%
[1] Cumulative gross unrealized appreciation for federal income tax purposes is $150.4 million; cumulative gross unrealized depreciation for federal income tax purposes is $119.3 million. Cumulative net unrealized appreciation is $31.1 million, based on a tax cost of $722.4 million.
[2] Cumulative gross unrealized appreciation for federal income tax purposes is $140.8 million; cumulative gross unrealized depreciation for federal income tax purposes is $97.1 million. Cumulative net unrealized appreciation is $43.8 million, based on a tax cost of $670.6 million.