COMMITMENTS AND CONTINGENCIES - Unfunded commitments (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Unfunded commitments
Total Unfunded Commitments	$ 35,843	$ 40,994
Revolving Loan Commitments
Unfunded commitments
Total Unfunded Commitments	19,354	19,819
Revolving Loan Commitments \| BUSA Acquisition Co. (d/b/a BankCard USA Merchant Services Inc.)
Unfunded commitments
Total Unfunded Commitments	643	643
Revolving Loan Commitments \| Claridge Products and Equipment, LLC
Unfunded commitments
Total Unfunded Commitments	70	140
Revolving Loan Commitments \| Cultural Experiences Abroad, LLC (d/b/a Cultural Experiences Abroad, Inc.)
Unfunded commitments
Total Unfunded Commitments	447
Revolving Loan Commitments \| EducationDynamics, LLC
Unfunded commitments
Total Unfunded Commitments	660	840
Revolving Loan Commitments \| Four Winds Health, LLC
Unfunded commitments
Total Unfunded Commitments	625	625
Revolving Loan Commitments \| Gulf Winds International Acquisition, LLC (d/b/a Gulf Winds International, Inc.)
Unfunded commitments
Total Unfunded Commitments	134	235
Revolving Loan Commitments \| Infotree Holdco LLC (d/b/a Infotree Global Solutions LLC)
Unfunded commitments
Total Unfunded Commitments	530	530
Revolving Loan Commitments \| Intermedia Cloud Communications, Inc. (d/b/a Intermedia.net, Inc.)
Unfunded commitments
Total Unfunded Commitments	833
Revolving Loan Commitments \| Juniper Landscaping Holdings LLC
Unfunded commitments
Total Unfunded Commitments	513	677
Revolving Loan Commitments \| Leviathan Intermediate Holdco, LLC (d/b/a Unleashed Brands Group)
Unfunded commitments
Total Unfunded Commitments	570	570
Revolving Loan Commitments \| LogicMonitor, Inc.
Unfunded commitments
Total Unfunded Commitments	778	778
Revolving Loan Commitments \| Media Source, LLC (d/b/a Media Source Inc.)
Unfunded commitments
Total Unfunded Commitments	675	825
Revolving Loan Commitments \| Meta Buyer LLC (d/b/a Metagenics, LLC)
Unfunded commitments
Total Unfunded Commitments		1,475
Revolving Loan Commitments \| Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC)
Unfunded commitments
Total Unfunded Commitments	76
Revolving Loan Commitments \| Quick Holdings, LLC (d/b/a Motivational Fulfillment)
Unfunded commitments
Total Unfunded Commitments	630	945
Revolving Loan Commitments \| M&M OpCo. LLC (d/b/a Escalent, Inc.)
Unfunded commitments
Total Unfunded Commitments	162	238
Revolving Loan Commitments \| NM Z Holdco Inc. (d/b/a Zep, Inc.)
Unfunded commitments
Total Unfunded Commitments	623
Revolving Loan Commitments \| PANOS Brands, LLC
Unfunded commitments
Total Unfunded Commitments	357	412
Revolving Loan Commitments \| PGI Parent LLC (d/b/a Prime Electric, Inc.)
Unfunded commitments
Total Unfunded Commitments		923
Revolving Loan Commitments \| Quest Events, LLC [Member]
Unfunded commitments
Total Unfunded Commitments	88	88
Revolving Loan Commitments \| Rewards Network Inc.
Unfunded commitments
Total Unfunded Commitments	2,394	1,915
Revolving Loan Commitments \| Ribbon Communications Operating Company, Inc. (d/b/a Ribbon Communications Inc.)
Unfunded commitments
Total Unfunded Commitments	880	880
Revolving Loan Commitments \| Salon Republic Holdings, LLC (d/b/a Salon Republic, LLC)
Unfunded commitments
Total Unfunded Commitments	861	861
Revolving Loan Commitments \| Sleep OpCo LLC (d/b/a 3Z Brands)
Unfunded commitments
Total Unfunded Commitments	1,545	1,545
Revolving Loan Commitments \| Surge Amuze Holdings Inc. (d/b/a Amuze Products II, Inc.)
Unfunded commitments
Total Unfunded Commitments		281
Revolving Loan Commitments \| Telestream 2 LLC (d/b/a Telestream Holdings Corporation)
Unfunded commitments
Total Unfunded Commitments	497	497
Revolving Loan Commitments \| Texas Express Wash, LLC (d/b/a ClearWater Express Wash)
Unfunded commitments
Total Unfunded Commitments	311	311
Revolving Loan Commitments \| The Kyjen Company, LLC (d/b/a Outward Hound)
Unfunded commitments
Total Unfunded Commitments	563	798
Revolving Loan Commitments \| TOT Group, Inc. (d/b/a Netevia Group LLC)
Unfunded commitments
Total Unfunded Commitments	553	553
Revolving Loan Commitments \| Vibration Mountings & Controls, Inc.
Unfunded commitments
Total Unfunded Commitments	717
Revolving Loan Commitments \| W&A Intermediate Co., LLC (d/b/a Wakefield & Associates, LLC)
Unfunded commitments
Total Unfunded Commitments	325	428
Revolving Loan Commitments \| Whitestone Home Furnishings, LLC (d/b/a Saatva, Inc.)
Unfunded commitments
Total Unfunded Commitments	488
Revolving Loan Commitments \| Zephyr Buyer, L.P. (d/b/a The Weather Company, LLC)
Unfunded commitments
Total Unfunded Commitments	1,806	1,806
Delayed Draw Loan Commitments
Unfunded commitments
Total Unfunded Commitments	16,489	21,175
Delayed Draw Loan Commitments \| Four Winds Health, LLC
Unfunded commitments
Total Unfunded Commitments	2,000	2,250
Delayed Draw Loan Commitments \| Juniper Landscaping Holdings LLC
Unfunded commitments
Total Unfunded Commitments	1,657	2,769
Delayed Draw Loan Commitments \| LogicMonitor, Inc.
Unfunded commitments
Total Unfunded Commitments	1,000	1,000
Delayed Draw Loan Commitments \| Meta Buyer LLC (d/b/a Metagenics, LLC)
Unfunded commitments
Total Unfunded Commitments		3,380
Delayed Draw Loan Commitments \| Rewards Network Inc.
Unfunded commitments
Total Unfunded Commitments	2,554	2,553
Delayed Draw Loan Commitments \| Salon Republic Holdings, LLC (d/b/a Salon Republic, LLC)
Unfunded commitments
Total Unfunded Commitments		861
Delayed Draw Loan Commitments \| Surge Amuze Holdings Inc. (d/b/a Amuze Products II, Inc.)
Unfunded commitments
Total Unfunded Commitments	814	451
Delayed Draw Loan Commitments \| Texas Express Wash, LLC (d/b/a ClearWater Express Wash)
Unfunded commitments
Total Unfunded Commitments	2,012	2,485
Delayed Draw Loan Commitments \| TOT Group, Inc. (d/b/a Netevia Group LLC)
Unfunded commitments
Total Unfunded Commitments	553	553
Delayed Draw Loan Commitments \| Vibration Mountings & Controls, Inc.
Unfunded commitments
Total Unfunded Commitments	1,433
Delayed Draw Loan Commitments \| W&A Intermediate Co., LLC (d/b/a Wakefield & Associates, LLC)
Unfunded commitments
Total Unfunded Commitments	1,288	1,288
Delayed Draw Loan Commitments \| Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC)
Unfunded commitments
Total Unfunded Commitments	1,422	1,422
Delayed Draw Loan Commitments \| Buckeye Acquiror LLC (d/b/a Superior Environmental Solutions, LLC)
Unfunded commitments
Total Unfunded Commitments		601
Delayed Draw Loan Commitments \| Camarillo Fitness Holdings, LLC [Member]
Unfunded commitments
Total Unfunded Commitments		486
Delayed Draw Loan Commitments \| Kelso Industries LLC
Unfunded commitments
Total Unfunded Commitments	888
Delayed Draw Loan Commitments \| MGT Merger Target, LLC (d/b/a MGT Consulting Group)
Unfunded commitments
Total Unfunded Commitments	$ 868	$ 1,076