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INVENTORIES - Narrative (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Inventory [Line Items]        
Impairment of inventories $ 5,362,000 $ 5,362,000 $ 0 $ 0