SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Allowance for Doubtful Accounts Receivable	$ 177	$ 1,041
Advertising Expense	7,095	8,079	$ 9,869
Shipping, Handling and Transportation Costs	$ 8,133	$ 7,851	$ 8,500