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Accounts Receivable Sales Agreement - Additional Information (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Receivables [Abstract]    
Sale agreement term 3 years  
Amount held as collateral $ 983,000 $ 771
Sale agreement amount 800  
Principal amount outstanding of receivables sold at period end $ 800 $ 800