Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Product revenue, net	$ 44,948	$ 32,815	$ 79,292	$ 58,122
Licensing revenue	293	296	586	532
Total revenue, net	45,241	33,111	79,878	58,654
Less: Cost of goods sold	11,401	8,861	19,599	15,757
Gross margin	33,840	24,250	60,279	42,897
Operating expenses:
Selling, general and administrative	31,545	26,066	65,716	54,086
Research and development	13,694	12,578	24,517	26,308
Total operating expenses	45,239	38,644	90,233	80,394
Operating loss	(11,399)	(14,394)	(29,954)	(37,497)
Gain on change in fair value of derivative liabilities		5,810		4,560
Interest expense, net	(2,315)	(5,616)	(4,696)	(11,202)
Other income (expense), net	80	(182)	75	(303)
Loss from operations before taxes	(13,634)	(14,382)	(34,575)	(44,442)
Benefit from income taxes		1,028		1,317
Net loss	$ (13,634)	$ (13,354)	$ (34,575)	$ (43,125)
Loss per share:
Basic	$ (0.05)	$ (0.07)	$ (0.13)	$ (0.23)
Diluted	$ (0.05)	$ (0.07)	$ (0.13)	$ (0.23)
Weighted average shares:
Basic	270,725	184,471	270,445	184,262
Diluted	270,725	184,471	270,445	184,262