CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Net sales	$ 49,015	$ 33,518	$ 135,461	$ 78,650
Cost of sales	4,979	3,348	15,217	9,065
Gross margin	44,036	30,170	120,244	69,585
Operating expenses:
Research and development expenses	2,187	2,014	6,072	5,204
Selling, general and administrative expenses	34,901	24,193	96,860	61,238
Amortization of intangible assets	234	232	699	695
Operating income	6,714	3,731	16,613	2,448
Other income (expense), net
Interest income (expense), net	(5)	(9)	(18)	(39)
Income before income tax provision	6,709	3,722	16,595	2,409
Income tax provision	(158)	(22)	(527)	(22)
Net income	$ 6,551	$ 3,700	$ 16,068	$ 2,387
Net income per common share - basic	$ 0.06	$ 0.03	$ 0.15	$ 0.02
Net income per common share - diluted	$ 0.06	$ 0.03	$ 0.14	$ 0.02
Weighted average shares outstanding - basic	106,511,294	105,756,945	106,178,136	105,331,344
Weighted average shares outstanding - diluted	114,556,036	112,814,658	114,110,120	112,525,016