Consolidated Statements of Changes in Net Assets (Parenthetical) - USD ($)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement Of Stockholders Equity [Abstract]
Dividends paid to shareholders include tax return of capital	$ 0	$ 13,563,291	$ 11,313,222	$ 2,486,618	$ 0

Amount of distribution in excess of tax-basis earnings and profit of investment company.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 20
-Section 50
-Paragraph 8
-URI https://asc.fasb.org/extlink&oid=66023616&loc=d3e9079-115832

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 205
-Section 45
-Paragraph 3
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=118262037&loc=d3e9915-115836

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