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INVENTORIES (Schedule of Inventory) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Mar. 31, 2018
INVENTORIES [Abstract]      
Raw materials $ 13,103 $ 12,986 $ 11,557
Work-in-process 1,129 715 1,013
Finished goods 55,673 59,121 52,581
Total $ 69,905 $ 72,822 $ 65,151