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Balance Sheet Disclosures - Summary of Accounts Receivable (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Balance Sheet Disclosures [Abstract]    
Accounts receivable – trade $ 11,823 $ 6,370
Allowance for doubtful accounts (140)  
Accounts receivable, net $ 11,683 $ 6,370