SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Doubtful Receivables [Member]
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES [Line Items]
Balance at Beginning of Period	$ 267	$ 189
Charged (Credited) to Costs and Expenses	91	93
Deductions	241	15
Balance at End of Period	117	267
Discount Returns and Allowance [Member]
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES [Line Items]
Balance at Beginning of Period	137	186
Charged (Credited) to Costs and Expenses	18	(49)
Deductions
Balance at End of Period	155	137
Doubtful Receivables & Discounts Returns and Allowances [Member]
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES [Line Items]
Balance at Beginning of Period	404	375
Charged (Credited) to Costs and Expenses	109	44
Deductions	241	15
Balance at End of Period	272	404
Valuation Allowance of Deferred Tax Assets [Member]
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES [Line Items]
Balance at Beginning of Period	19,194	21,724
Charged (Credited) to Costs and Expenses
Deductions	6,606	2,530
Balance at End of Period	$ 12,588	$ 19,194