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ACCRUED LIABILITIES - Schedule of Accrued Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Accrued Liabilities [Abstract]    
Salaries, commissions, incentive compensation and benefits $ 5,524 $ 4,107
Customer rebates and sales incentives 24,198 8,527
Freight 4,908 7,286
Operating lease liabilities, current 3,170  
Other 9,292 9,090
Total accrued liabilities $ 47,092 $ 29,010