Quarterly report pursuant to Section 13 or 15(d)

Debt - Summary of Debt Obligations (Details)

v3.21.2
Debt - Summary of Debt Obligations (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Total debt $ 1,127 $ 10,071
Debt discount - warrants (2020 Convertible Notes) 0 (1,029)
Debt discount - issuance costs (2020 Convertible Notes) 0 (650)
Less: current maturities of long-term debt (83) (4,435)
Less: related-party debt (195) (195)
Long-term debt 849 3,762
Series A Note    
Debt Instrument [Line Items]    
Total debt 0 2,481
Series B Note    
Debt Instrument [Line Items]    
Total debt 0 3,585
Paycheck Protection Program Loan    
Debt Instrument [Line Items]    
Total debt 0 2,850
Convertible notes    
Debt Instrument [Line Items]    
Total debt 222 250
Promissory notes    
Debt Instrument [Line Items]    
Total debt $ 905 $ 905