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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Accounting Policies [Abstract] |  |  |
Investment company, accounting and reporting under Topic 946 | true |  |
Total asset investment, percentage | 95.10% |  |
Cash and cash equivalents, held in foreign currency | $ 804,000 | $ 1,178,000 |
Cash and cash equivalents, held in foreign currency | 842,000 | 1,168,000 |
Other comprehensive income | $ 0 | $ 0 | $ 0

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- Definition Amount of cash and cash equivalents held in foreign currency. Excludes cash within disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalents include, but are not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480167/946-830-55-12 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 45 -Paragraph 21 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480555/946-210-45-21 + Details
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