Quarterly report [Sections 13 or 15(d)]

Senior Secured Revolving Credit Facility - Additional Information (Details)

v3.25.3
Senior Secured Revolving Credit Facility - Additional Information (Details)
3 Months Ended 9 Months Ended
Jun. 27, 2022
USD ($)
Sep. 30, 2025
USD ($)
shares
Sep. 30, 2024
USD ($)
Sep. 30, 2025
USD ($)
shares
Sep. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
Line of Credit Facility [Line Items]            
Line of credit facility, outstanding balance     $ 3,900,000   $ 3,900,000 $ 600,000
Revolving Credit Facility            
Line of Credit Facility [Line Items]            
Unused commitment fee related to credit facility   $ 19,167 11,528 $ 56,623 21,143  
Credit Agreement | Minimum            
Line of Credit Facility [Line Items]            
Tangible assets $ 50,000,000          
Asset coverage ratio 0.3333          
Interest coverage ratio 0.40          
Credit Agreement | Revolving Credit Facility            
Line of Credit Facility [Line Items]            
Line of credit facility, outstanding balance   0   0   600,000
Unamortized closing fee   43,750   43,750   $ 62,500
Amortization expense   6,250 $ 6,250 18,750 $ 18,750  
M&T Bank | Credit Agreement | Revolving Credit Facility            
Line of Credit Facility [Line Items]            
Line of credit facility, maximum borrowing capacity $ 25,000,000          
Aggregate sum of fair market values of publicly traded equity securities held, percentage 75.00%          
Fair market value of shares of ACV Auctions held, percentage 75.00%          
Aggregate sum of the fair market values of eligible private loans held, percentage 50.00%          
Aggregate sum of the fair market values of unsecured private loans held, percentage 50.00%          
Line of credit facility, available borrowing capacity $ 6,250,000 $ 18,300,000   $ 18,300,000    
Publicly traded equity securities or shares of ACV Auctions | shares   0   0    
Maturity date Jun. 27, 2027          
Variable rate 0.25%          
Interest rate   7.74%   7.74%    
Line of credit facility, unused capacity, commitment fee 0.30%          
Percentage of availability of aggregate borrowing base credit facility 25.00%          
Line of credit facility, outstanding balance $ 1,250,000          
M&T Bank | Credit Agreement | Revolving Credit Facility | Minimum            
Line of Credit Facility [Line Items]            
Variable rate 3.50%          
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember