CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Net sales	$ 118,223	$ 59,181	$ 27,053
Cost of sales	12,665	9,328	5,188
Gross margin	105,558	49,853	21,865
Operating expenses:
Research and development expenses	7,050	4,843	2,885
Selling, general and administrative expenses	90,480	46,227	19,591
Impairment of intangible assets	0	368	1,798
Fair value adjustment of earn-out liability	0	0	1,567
Amortization of intangible assets	928	1,054	1,380
Operating income (loss)	7,100	(2,639)	(5,356)
Other income (expense), net
Amortization of debt discount	0	(1,328)	(1,714)
Interest expense, net	(48)	(45)	(593)
Income (loss) before income tax provision	7,052	(4,012)	(7,663)
Income tax provision	(832)	(100)	0
Net income (loss)	$ 6,220	$ (4,112)	$ (7,663)
Net income (loss) per common share - basic (in dollars per share)	$ 0.06	$ (0.04)	$ (0.09)
Net income (loss) per common share - diluted (in dollars per share)	$ 0.05	$ (0.04)	$ (0.09)
Weighted average shares outstanding - basic (in shares)	105,793,008	96,285,504	81,646,295
Weighted average shares outstanding - diluted (in shares)	113,295,504	96,285,504	81,646,295