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Significant Accounting Policies - Additional Information (Details)
12 Months Ended
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%