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Accounts Receivable, Net
9 Months Ended
Sep. 30, 2021
Receivables [Abstract]  
Accounts and Nontrade Receivable Accounts Receivable, Net
Accounts receivable consisted of the following (in thousands):
 September 30, 2021December 31, 2020
Accounts receivable, gross$37,403 $36,160 
Less: allowance for doubtful accounts(867)(737)
Accounts receivable, net$36,536 $35,423