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ACCRUED LIABILITIES (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
ACCRUED LIABILITIES    
Warranty liability $ 2,886 $ 3,027
Litigation reserve 495 570
Federal and state taxes payable 4,255 2,252
Accrued expenses & other accrued liabilities 2,673 3,307
Accrued Liabilities $ 10,309 $ 9,156