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Accrued Liabilities - Schedule of Accrued Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Payables and Accruals [Abstract]    
Wages/commissions payable $ 2,170 $ 3,332
Other accrued liabilities 2,259 1,818
Accrued Liabilities $ 4,429 $ 5,150