Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Accounts Receivable, Net (Details)

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Summary of Significant Accounting Policies - Accounts Receivable, Net (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Accounting Policies [Abstract]    
Customer receivables $ 79,899 $ 64,180
Other receivables 23 1,466
Rebates receivable 957 3,017
Allowance for doubtful accounts (3,151) (2,228)
Accounts receivable, net $ 77,728 $ 66,435