QUARTERLY INFORMATION (UNAUDITED) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Quarterly Financial Information [Line Items]
Net sales	$ 8,972	$ 5,130	$ 1,797	$ 6,171	$ 9,602	$ 5,949	$ 1,939	$ 7,542	$ 22,070	$ 25,032	$ 22,406
Gross profit	5,896	3,510	792	3,980	6,587	3,817	928	5,339	14,179	16,671	14,252
Net income (loss)	$ (676)	$ (3,216)	$ (3,138)	$ (804)	$ 597	$ 1,237	$ (1,719)	$ 290	$ (7,834)	$ 405	$ (1,091)
Basic and diluted income (loss) per share:
Basic income (loss) per share (in dollars per share)					$ 0.04	$ 0.08	$ (0.11)	$ 0.02
Diluted income (loss) per share (in dollars per share)					$ 0.04	$ 0.08	$ (0.11)	$ 0.02	$ (0.47)	$ 0.03	$ (0.07)
Net loss (in dollars per share)	$ (0.05)	$ (0.18)	$ (0.19)	$ (0.05)