Commitments and Contingencies - Summary of Unfunded Commitments (Detail) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	$ 22,528	$ 21,083
Treace Medical Concepts, Inc. [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	6,229	6,229
Refocus Management Services, LLC [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	2,486	0
Ardelyx, Inc [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	2,387	2,387
DeepIntent, Inc. [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	2,352	2,211
SunMed Receivables I, LLC [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	1,457	1,457
OIS Management Services, LLC [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	1,296	1,296
AAH Topco, LLC [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	1,035	1,381
Western Veterinary Partners LLC [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	827	1,740
Pinnacle Fertility Inc. [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	744	744
Montefiore Nyack Hospital [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	725	0
NS and Associates LLC [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	457	457
CVAUSA Management, LLC [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	429	445
Arcutis Biotherapeutics, Inc. [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	419	837
Southern Orthodontic Partners Management, LLC [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	359	756
Eyesouth Eye Care Holdco LLC [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	335	447
Metro West Ambulance Service, Inc. [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	293	0
United Digestive MSO Parent, LLC [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	193	192
Foundation Consumer Brands LLC [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	171	171
SunMed Group Holdings, LLC [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	132	132
Exactcare Parent, Inc. [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	102	102
Medrina, LLC [Member]
Summary Of Unfunded Commitments [Line Items]
Unfunded Commitments	$ 100	$ 99