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Long-term Debt - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 21, 2021
Dec. 31, 2020
Apr. 20, 2020
Debt Instrument [Line Items]      
KAR/AFC note payable conversion (in shares) 347,992    
Warrant exercised into shares (in shares) 73,869    
Convertible notes payable      
Debt Instrument [Line Items]      
Payment of debt $ 3,000    
Long-term debt, gross   $ 3,500  
Interest rate   6.00%  
Interest rate, basis term   365 days  
Interest payable   $ 212  
Paycheck Protection Program loan      
Debt Instrument [Line Items]      
Long-term debt   $ 1,749 $ 1,749