v3.26.3
Senior Secured Revolving Credit Facility - Additional Information (Details)
3 Months Ended 9 Months Ended
Jun. 27, 2022
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Line of Credit Facility [Line Items]            
Line of credit facility, outstanding balance   $ 5,000,000 $ 0 $ 5,000,000 $ 0 $ 0
Revolving Credit Facility            
Line of Credit Facility [Line Items]            
Line of credit facility, commitment fee   15,493 19,167 50,978 56,623  
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   5,000,000   5,000,000   0
Line of credit facility, closing fee   18,750   18,750   $ 37,500
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 $ 12,400,000   $ 12,400,000    
Maturity date Jun. 27, 2027          
Variable rate 0.25%          
Interest rate   7.40%   7.40%    
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