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Accounts Receivable - Schedule of Components of Company's Receivable (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Accounts And Notes Receivable Net [Abstract]    
Trade receivables $ 3,548 $ 4,217
Allowance for doubtful accounts (750) (65)
Accounts receivable, net 2,798 4,152
Vendor non-trade receivables 2,845 453
Total accounts receivable $ 5,643 $ 4,605