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Revenue Recognition - Schedule of Balances included in Condensed Consolidated Statement of Financial Position (Unaudited) Related to Revenue Recognition (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Accounts Receivable [Member]    
Disaggregation Of Revenue [Line Items]    
Returns, discounts and other allowances $ (1,272) $ (853)
Inventories, net [Member]    
Disaggregation Of Revenue [Line Items]    
Right of return asset 529 433
Other Current Liabilities [Member]    
Disaggregation Of Revenue [Line Items]    
Customer deposits (1,099) (140)
Accrued rebates $ (2,177) $ (2,962)