Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Schedule Of Summary Of Significant Accounting Policies [Line Items]
Aggregate fair value of warrants and options	0.60%	0.70%
Non-expiring capital loss carryforwards	$ 2,888,408
Change in accounting principle, accounting standards update, adopted	true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2022
Change in accounting principle, accounting standards update, immaterial effect	true
Accounting Standards Update Extensible List	Accounting Standards Update202006 [Member]
Maximum
Schedule Of Summary Of Significant Accounting Policies [Line Items]
Percentage of aggregate fair value of net assets	5.00%
Percent of positions held	15.00%
Maximum | Level 3
Schedule Of Summary Of Significant Accounting Policies [Line Items]
Valuation technique relative weight range	100.00%
Minimum | Level 3
Schedule Of Summary Of Significant Accounting Policies [Line Items]
Valuation technique relative weight range	0.00%
Foreign Currency Forward Contracts
Schedule Of Summary Of Significant Accounting Policies [Line Items]
Forward foreign currency contracts	$ 0	$ 0
BlackRock Capital Investment Corporation
Schedule Of Summary Of Significant Accounting Policies [Line Items]
Ownership percentage by parent	100.00%