COMMITMENTS AND CONTINGENCIES - Unused Commitments (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Mar. 31, 2025
Total Unfunded Debt Commitments
Other Commitments [Line Items]
Total Unfunded Debt Commitments	$ 222,439	$ 196,907
Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	124,939	122,735
Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	97,500	73,704
Other
Other Commitments [Line Items]
Total Unfunded Debt Commitments	0	468
Investment, Identifier [Axis]: 360 Quote TopCo, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,404	0
Investment, Identifier [Axis]: AAC New Holdco Inc., Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	47	0
Investment, Identifier [Axis]: ATS Operating, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	1,140	890
Investment, Identifier [Axis]: Air Conditioning Specialist Inc., Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	1,320	3,229
Investment, Identifier [Axis]: Air Conditioning Specialist, Inc., Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	1,910	1,910
Investment, Identifier [Axis]: Apple Roofing Administrative Services, LLC (fka Roof OpCo, LLC), Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	3,056	3,056
Investment, Identifier [Axis]: ArborWorks, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	1,082	1,116
Investment, Identifier [Axis]: BP Loenbro Holdings Inc., Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	358	1,101
Investment, Identifier [Axis]: BP Loenbro Holdings Inc., Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	1,321	1,321
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	1,200	1,200
Investment, Identifier [Axis]: Brandner Design, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	900	900
Investment, Identifier [Axis]: Broad Sky Networks, LLC
Other Commitments [Line Items]
Total Unfunded Debt Commitments	0	57
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	79	296
Investment, Identifier [Axis]: CDC Dental Management Co., LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,000	1,500
Investment, Identifier [Axis]: Campany Roof Maintenance, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	1,064	1,064
Investment, Identifier [Axis]: Catbird NYC, LLC
Other Commitments [Line Items]
Total Unfunded Debt Commitments	125	125
Investment, Identifier [Axis]: Catbird NYC, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	4,000	4,000
Investment, Identifier [Axis]: Cavalier Buyer, Inc., Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	0	2,000
Investment, Identifier [Axis]: Central Medical Supply LLC, Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	0	1,400
Investment, Identifier [Axis]: Central Medical Supply LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	750	1,050
Investment, Identifier [Axis]: Crafty Apes, LLC, Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	924	924
Investment, Identifier [Axis]: Cumbria Capital MSO, LLC, Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	950	950
Investment, Identifier [Axis]: Cumbria Capital MSO, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	1,500	1,100
Investment, Identifier [Axis]: Damotech Inc., Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	3,000	3,000
Investment, Identifier [Axis]: Drive Line Service of Portland, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,000	2,000
Investment, Identifier [Axis]: Edge Autonomy Holdings, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	0	4,000
Investment, Identifier [Axis]: Enstoa, Inc., Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	10,671	0
Investment, Identifier [Axis]: Exact Borrower, LLC, Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,200	2,200
Investment, Identifier [Axis]: Exact Borrower, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,500	2,500
Investment, Identifier [Axis]: FS Vector LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	4,000	4,000
Investment, Identifier [Axis]: GPT Industries, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	3,000	3,000
Investment, Identifier [Axis]: GrammaTech, Inc., Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	1,000	1,000
Investment, Identifier [Axis]: Gravitiq LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	5,000	5,000
Investment, Identifier [Axis]: Gulf Pacific Acquisition, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	151	303
Investment, Identifier [Axis]: ISI Enterprises, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,000	2,000
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	15,863	0
Investment, Identifier [Axis]: Ignite Visibility LLC, Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	4,500	0
Investment, Identifier [Axis]: Ignite Visibility LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	3,000	1,500
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC
Other Commitments [Line Items]
Total Unfunded Debt Commitments	411	411
Investment, Identifier [Axis]: Institutes of Health, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	1,000	1,000
Investment, Identifier [Axis]: Island Pump and Tank, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,087	3,479
Investment, Identifier [Axis]: KMS, LLC, Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,286	2,286
Investment, Identifier [Axis]: LEHR Upfitters, LLC, Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,449	5,247
Investment, Identifier [Axis]: LEHR Upfitters, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,623	2,623
Investment, Identifier [Axis]: LGM Pharma LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	1,500	1,500
Investment, Identifier [Axis]: LKC Technologies, Inc., Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,000	2,000
Investment, Identifier [Axis]: Lighting Retrofit International, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,083	1,354
Investment, Identifier [Axis]: Lightning Intermediate II, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	1,852	1,852
Investment, Identifier [Axis]: Main Line Brands LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,000	0
Investment, Identifier [Axis]: Mammoth BorrowCo, Inc., Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	900	200
Investment, Identifier [Axis]: Microbe Formulas LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	1,627	1,627
Investment, Identifier [Axis]: Mid-Florida Endodontics Management Company, LLC, Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	10,000	10,000
Investment, Identifier [Axis]: Mid-Florida Endodontics Management Company, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	3,000	3,000
Investment, Identifier [Axis]: Mission Critical Group, LLC, Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	4,565	0
Investment, Identifier [Axis]: Mission Critical Group, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	1,902	0
Investment, Identifier [Axis]: Musiker Discovery Programs, Inc., Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	7,500	7,500
Investment, Identifier [Axis]: Musiker Discovery Programs, Inc., Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	3,000	2,000
Investment, Identifier [Axis]: NeuroPsychiatric Hospitals, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,000	2,000
Investment, Identifier [Axis]: New Skinny Mixes, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,000	3,000
Investment, Identifier [Axis]: NinjaTrader, Inc., Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	0	2,500
Investment, Identifier [Axis]: One Group, LLC, Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	545	545
Investment, Identifier [Axis]: Pipeline Technique Ltd., Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	944	944
Investment, Identifier [Axis]: Pool Service Partners, Inc., Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	6,100	6,100
Investment, Identifier [Axis]: Pool Service Partners, Inc., Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,000	2,000
Investment, Identifier [Axis]: Red Dog Operations Holding Company LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,000	2,000
Investment, Identifier [Axis]: Revo Brands, Inc., Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	3,600	4,300
Investment, Identifier [Axis]: Roseland Management, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,000	2,000
Investment, Identifier [Axis]: ServerLIFT, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	4,000	4,000
Investment, Identifier [Axis]: SocialSEO, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,300	2,200
Investment, Identifier [Axis]: Spectrum of Hope, LLC
Other Commitments [Line Items]
Total Unfunded Debt Commitments	0	411
Investment, Identifier [Axis]: Spotlight AR, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,000	2,000
Investment, Identifier [Axis]: Superior Health Parent LLC, Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	10,000	10,000
Investment, Identifier [Axis]: Superior Health Parent LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,000	2,000
Investment, Identifier [Axis]: SureKap, LLC, Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	7,222	7,222
Investment, Identifier [Axis]: Swensons Drive-In Restaurants, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	1,500	1,500
Investment, Identifier [Axis]: TMT BHC Buyer, Inc., Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	0	5,000
Investment, Identifier [Axis]: TMT BHC Buyer, Inc., Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	4,717	4,717
Investment, Identifier [Axis]: The Gobel Group, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	1,000	1,000
Investment, Identifier [Axis]: Tru Fragrance & Beauty LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	2,200	4,000
Investment, Identifier [Axis]: VP Move Purchaser, Inc., Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	4,200	3,900
Investment, Identifier [Axis]: Wash & Wax Systems LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	430	0
Investment, Identifier [Axis]: Well-Foam, Inc., Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	4,500	4,500
Investment, Identifier [Axis]: Winter Services Operations, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	6,667	1,333
Investment, Identifier [Axis]: Zenfolio Inc., Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	500	1,500
Investment, Identifier [Axis]: iVueit, LLC, Delayed Draw Term Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	10,000	10,000
Investment, Identifier [Axis]: iVueit, LLC, Revolving Loans
Other Commitments [Line Items]
Total Unfunded Debt Commitments	$ 750	$ 1,000