INCOME TAXES - Schedule of Significant Components of Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Investment Company, Summary Of Dividends And Distributions, Tax Differences [Line Items]
162(m) limitation	$ 0	$ 0	$ 122
Excise tax	630	65	637
Write-off of deferred tax asset	0	0	1,837
Tax (benefit) provision related to Taxable Subsidiary	329	615	2,442
Stock compensation benefits	0	0	(207)
Other	0	0	3
Total income tax provision (benefit)	329	615	2,442
Taxable Subsidiary
Investment Company, Summary Of Dividends And Distributions, Tax Differences [Line Items]
Tax (benefit) provision related to Taxable Subsidiary	(300)	500	1,800
Total income tax provision (benefit)	$ (301)	$ 550	$ 50