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Accounts Receivable - Composition of Accounts Receivable, Net (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Receivables [Abstract]    
Gross accounts receivable - trade $ 7,990 $ 7,117
Less: Allowances for doubtful accounts (1,354) (548)
Accounts receivable, net $ 6,636 $ 6,569