Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	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, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
NET SALES	$ 51,835	$ 49,015	$ 45,679	$ 40,767	$ 39,573	$ 33,518	$ 25,573	$ 19,559	$ 17,994	$ 16,116	$ 13,515	$ 11,556	$ 187,296	$ 118,223	$ 59,181
GROSS MARGIN	46,849	44,036	40,590	35,619	35,973	30,170	22,833	16,582	14,883	14,002	11,316	9,651	167,094	105,558	49,853
NET INCOME (LOSS)	$ 13,378	$ 6,551	$ 5,430	$ 4,087	$ 3,832	$ 3,700	$ (390)	$ (922)	$ (1,427)	$ (307)	$ (757)	$ (1,620)	$ 29,446	$ 6,220	$ (4,112)
Net income (loss) per common share - basic (in dollars per share)	$ 0.13	$ 0.06	$ 0.05	$ 0.04	$ 0.04	$ 0.03	$ 0.00	$ (0.01)	$ (0.01)	$ 0.00	$ (0.01)	$ (0.02)	$ 0.28	$ 0.06	$ (0.04)
Net income (loss) per common share - diluted (in dollars per share)	$ 0.11	$ 0.06	$ 0.05	$ 0.04	$ 0.03	$ 0.03	$ 0.00	$ (0.01)	$ (0.01)	$ 0.00	$ (0.01)	$ (0.02)	$ 0.26	$ 0.05	$ (0.04)