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Debt (Narrative) (Details) - USD ($)
9 Months Ended
Aug. 23, 2022
Aug. 23, 2021
May 05, 2021
Sep. 30, 2022
Heritage Global LLC [Member]        
Debt Instrument [Line Items]        
Line of credit   $ 2,000,000.0    
Debt instrument, Maturity date   Aug. 23, 2025    
Interest rate per annum   3.00%    
Litigation settlement installments amount due   $ 44,000    
Debt outstanding amount       $ 1,500,000
Wall Street Journal prime rate [Member] | Heritage Global LLC [Member]        
Debt Instrument [Line Items]        
Interest rate per annum     1.70%  
C3bank [Member]        
Debt Instrument [Line Items]        
Line of credit     $ 10,000,000.0  
Debt instrument, Maturity date     May 07, 2023  
Convert From Revolving Debt To Term Debt     $ 5,000,000.0  
C3bank [Member] | Maximum [Member]        
Debt Instrument [Line Items]        
Interest rate per annum     4.95%  
C3bank [Member] | Revolving Line of Credit [Member] | Maximum [Member]        
Debt Instrument [Line Items]        
Line of credit, drawn amount $ 10,000,000.0