SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Sales	$ 86,794	$ 67,211	$ 70,186	$ 67,822	$ 86,960	$ 76,805	$ 82,356	$ 69,128	$ 292,013	$ 315,249	$ 311,633
Gross Profit	28,079	23,151	23,553	22,744	30,352	25,369	26,962	21,855	97,527	104,538	100,782
Net income (loss)	$ 3,707	$ (1,383)	$ 145	$ (1,245)	$ 2,759	$ (327)	$ 1,586	$ (1,408)	$ 1,224	$ 2,610	$ (2,140)
Basic (loss) earnings per share (in dollars per share)	$ 0.29	$ (0.11)	$ 0.01	$ (0.10)	$ 0.22	$ (0.03)	$ 0.12	$ (0.11)	$ 0.10	$ 0.20	$ (0.17)
Diluted (loss) earnings per share (in dollars per share)	$ 0.29	$ (0.11)	$ 0.01	$ (0.10)	$ 0.21	$ (0.03)	$ 0.12	$ (0.11)	$ 0.09	$ 0.20	$ (0.17)
Denominator for basic (loss) earnings per share - weighted average shares (in shares)	12,854	12,835	12,812	12,797	12,793	12,793	12,776	12,742	12,824	12,776	12,661
Denominator for diluted (loss) earnings per share - adjusted weighted average shares (in shares)	12,922	12,835	12,898	12,797	12,886	12,793	12,857	12,742	12,909	12,872	12,661