Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue:
License fees		$ 1,036	$ 294	$ 3,108
Cost of revenue:
Product royalty fees	924		924
Operating expenses:
Research and development	9,073	6,982	23,677	20,965
General and administrative	8,994	3,686	19,810	9,962
Sales and marketing	13,217	1,615	23,839	6,676
Cost of sales	924		924
Total operating expenses	32,208	12,283	68,250	37,603
Loss from operations	(32,208)	(11,247)	(67,956)	(34,495)
Investment income	160	103	392	220
Interest expense	(12)	(16)	(40)	(53)
Net loss	$ (32,060)	$ (11,160)	$ (67,604)	$ (34,328)
Net loss per share-basic and diluted (in dollars per share)	$ (0.39)	$ (0.16)	$ (0.86)	$ (0.52)
Weighted average common shares outstanding-basic and diluted (in shares)	82,941	70,559	78,702	66,389