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Accounts Receivable and Allowance for Credit Losses - Components of Accounts Receivable (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Accounts Receivable and Allowance for Credit Losses    
Trade receivables $ 86,865 $ 84,571
Allowance for doubtful accounts   (818)
Trade receivable, net $ 86,865 $ 83,753