Annual report [Section 13 and 15(d), not S-K Item 405]

Senior Secured Revolving Credit Facility - Additional Information (Details)

v3.25.4
Senior Secured Revolving Credit Facility - Additional Information (Details)
 12 Months Ended
Jun. 27, 2022
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Line of Credit Facility [Line Items]          
Line of credit facility, outstanding balance   $ 0 $ 600,000 $ 16,250,000 $ 2,550,000
Amortization expense   25,000 25,000 25,000  
Revolving Credit Facility          
Line of Credit Facility [Line Items]          
Line of credit facility, commitment fee   75,582 38,651 44,434  
Line of credit facility, outstanding balance [1]     600,000 16,250,000 2,550,000
Credit Agreement | Minimum          
Line of Credit Facility [Line Items]          
Tangible assets $ 50,000,000        
Asset coverage ratio 0.3333        
Interest coverage ratio 0.4        
Credit Agreement | Revolving Credit Facility          
Line of Credit Facility [Line Items]          
Line of credit facility, outstanding balance   0 600,000    
Line of credit facility, closing fee         $ 125,000
Line of credit facility, closing fee   37,500 62,500    
Amortization expense   25,000 $ 25,000 $ 25,000  
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 $ 19,200,000      
Maturity date Jun. 27, 2027        
Variable rate 0.25%        
Interest rate   7.37%      
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] Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]        
[1] Total amount of each class of senior securities outstanding at the end of the period presented.