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Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)
 9 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Line of Credit Facility [Line Items]    
Investment aggregate capitalization 5.00%  
Investments aggregating capitalization valuations of Percentage 5.00%  
Minimum aggregate percentage of assets required for applicability of foregoing investment policies 5.00%  
Cash and cash equivalents $ 60,994,300 $ 91,589,702
Restricted cash $ 0 $ 0
Percentage of foreign currency denominated investments 0.004 0.004
Non-expiring capital loss carryforwards   $ 636,962,720
Unamortized issuance costs $ (5,868,338) (7,974,601)
Interest Rate Swap    
Line of Credit Facility [Line Items]    
Notional amount of interest rate swap $ 35,000,000  
Fixed interest rate 2.633%  
JPMorgan U.S. Government Money Market Fund    
Line of Credit Facility [Line Items]    
Cash and cash equivalents $ 6,900,000 $ 1,400,000
Percentage of cash and cash equivalents net assets held 0.90% 0.20%
Yield percentage of cash equivalents 4.04% 4.42%
Allspring Government Money Market Fund    
Line of Credit Facility [Line Items]    
Cash and cash equivalents $ 50,100,000 $ 59,200,000
Percentage of cash and cash equivalents net assets held 6.80% 7.50%
Yield percentage of cash equivalents 4.01% 4.36%