Commitments and Contingencies - Schedule of Unfunded Commitments to Extend Financing (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	$ 329,284,615	$ 186,984,615
Allurion Technologies, Inc. | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	15,000,000	15,000,000
CloudPay, Inc. | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	15,000,000	10,000,000
CrossRoads Extremity Systems, LLC | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing		7,500,000
Dtex Systems, Inc. | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	10,000,000	15,000,000
EBR Systems, Inc. | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	30,000,000
Gynesonics, Inc. | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing		20,000,000
INRIX, Inc. | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	5,000,000	10,000,000
Intellisite Holdings, Inc. (dba Epic IO Technologies, Inc.) | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	10,000,000	11,000,000
Interactions Corporation | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	10,000,000
Marley Spoon A G | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing		11,700,000
Moximed, Inc. | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	15,000,000
Mustang Bio, Inc. | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	45,000,000
Revelle Aesthetics, Inc. | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	12,500,000
Route 92 Medical, Inc. | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	42,000,000	42,000,000
SetPoint Medical Corporation | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	25,000,000	25,000,000
ShareThis, Inc. | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	3,000,000	3,000,000
Snagajob.com, Inc. | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	6,784,615	6,784,615
Synack, Inc. | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	25,000,000
VERO Biotech LLC | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	10,000,000	$ 10,000,000
Kin Insurance, Inc. | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	25,000,000
TRACON Pharmaceuticals, Inc. | Senior Secured Term Loan
Schedule Of Investments [Line Items]
Total unused commitments to extend financing	$ 25,000,000