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Significant Accounting Policies - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2022 USD ($) Segment | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) shares
Change in Accounting Estimate [Line Items] |  |  |
Number of reportable segments | Segment | 1 |  |
Number of operating segments | Segment | 1 |  |
Percentage of excise tax | 4.00% |  |
Income tax examination, description | The Company’s tax returns are generally subject to examination by U.S. federal and most state tax authorities for a period of three years from the date the respective returns are filed, and, accordingly, the Company’s 2019 through 2021 tax years remain subject to examination. |  |
Tax year subject to examination | 2019 2020 2021 |  |
Maximum number of common stock purchasable under stock repurchase program | $ | $ 5,000,000 |  |
Number of shares repurchased under repurchase program | shares |  |  | 25,719
Repurchase of common stock | $ | $ 0 | $ 0 | $ 268,000
Minimum |  |  |
Change in Accounting Estimate [Line Items] |  |  |
Percentage of voting securities | 25.00% |  |
Percentage of board representation | 50.00% |  |
Percentage of investment company taxable income | 90.00% |  |
Percentage of taxable income | 98.00% |  |
Percentage of net capital gains realized | 98.20% |  |
Minimum | Affiliate Investment |  |  |
Change in Accounting Estimate [Line Items] |  |  |
Percentage of voting securities | 5.00% |  |
Maximum | Affiliate Investment |  |  |
Change in Accounting Estimate [Line Items] |  |  |
Percentage of voting securities | 25.00% |  |

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- Definition A brief description of status of the tax examination, significant findings to date, and the entity's position with respect to the findings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(2) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8672-108599 + Details
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