Quarterly report pursuant to Section 13 or 15(d)

Senior Secured Revolving Credit Facility - Additional Information (Details)

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Senior Secured Revolving Credit Facility - Additional Information (Details)
3 Months Ended 6 Months Ended
Jun. 27, 2022
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Line of Credit Facility [Line Items]            
Line of credit facility, outstanding balance   $ 17,200,000   $ 17,200,000   $ 16,250,000
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   17,200,000   17,200,000   16,250,000
Unamortized closing fee   75,000   75,000   $ 87,500
Amortization expense   6,250 $ 6,250 12,500 $ 12,500  
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 $ 7,800,000   $ 7,800,000    
Maturity date Jun. 27, 2027          
Variable rate 0.25%          
Interest rate   8.83%   8.83%    
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 | SOFR            
Line of Credit Facility [Line Items]            
Variable rate 3.50%