Quarterly Financial Data (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, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
NET SALES	$ 39,573	$ 33,518	$ 25,573	$ 19,559	$ 17,994	$ 16,116	$ 13,515	$ 11,556	$ 10,509	$ 7,954	$ 4,884	$ 3,706	$ 118,223	$ 59,181	$ 27,053
GROSS MARGIN	35,973	30,170	22,833	16,582	14,883	14,002	11,316	9,651	8,820	6,529	3,769	2,747	105,558	49,853	21,865
Net income (loss)	$ 3,832	$ 3,700	$ (390)	$ (922)	$ (1,427)	$ (307)	$ (757)	$ (1,620)	$ (1,605)	$ (4,219)	$ (744)	$ (1,094)	$ 6,220	$ (4,112)	$ (7,663)
Net income (loss) per common share - basic (in dollars per share)	$ 0.04	$ 0.03	$ 0.00	$ (0.01)	$ (0.01)	$ 0.00	$ (0.01)	$ (0.02)	$ (0.01)	$ (0.05)	$ (0.01)	$ (0.01)	$ 0.06	$ (0.04)	$ (0.09)
Net income (loss) per common share - diluted (in dollars per share)	$ 0.03	$ 0.03	$ 0.00	$ (0.01)	$ (0.01)	$ 0.00	$ (0.01)	$ (0.02)	$ (0.01)	$ (0.05)	$ (0.01)	$ (0.01)	$ 0.05	$ (0.04)	$ (0.09)