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COMMITMENTS (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Operating Leased Assets [Line Items]    
Operating Leases, Rent Expense, Minimum Rentals $ 10,000,000 $ 10,100,000
Operating Leases, Rent Expense, Contingent Rentals 131,000 $ 254,000
Purchase Obligation, Due in Next Twelve Months $ 64,900,000