INCOME TAXES - Net Assets Resulting From Operations To Estimated RIC Taxable Income (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Net increase (decrease) in net assets from operations	$ 9,458	$ 2,510	$ (4,556)	$ 15,142	$ 11,968	$ 10,586
Net unrealized depreciation (appreciation) on investments	(3,649)	$ 12,248	$ 691	$ (7,051)	8,599	(6,360)
Income/gain (expense/loss) recognized for tax on pass-through entities					35	526
(Gain) loss recognized on dispositions					(159)	152
Capital loss carryover					6,622	0
Net operating income - wholly-owned subsidiary					(1,568)	(3,684)
Dividend income from wholly-owned subsidiary					745	0
Non-deductible tax expense					251	32
Non-deductible compensation					1,644	1,767
Compensation related book/tax differences					(3,583)	2,042
Other book/tax differences					1,434	2,306
Estimated distributable income before deductions for distributions					25,988	20,999
Income Tax Contingency [Line Items]
Realized loss on extinguishment of debt					0	$ 13,632
Capital loss carryforwards
Income Tax Contingency [Line Items]
Long-term capital loss carryforwards	$ 23,800				$ 23,800