Condensed Consolidated Statements of Operations - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues:
Product sales	$ 6,948,000	$ 4,052,000	$ 19,134,000	$ 11,072,000
Research and development revenues	2,929,000	10,373,000	8,320,000	25,971,000
Revenue sharing arrangement	107,000	445,000	847,000	1,825,000
Total revenues	9,984,000	14,870,000	28,301,000	38,868,000
Costs and operating expenses:
Cost of product sales	3,976,000	2,756,000	10,768,000	7,466,000
Research and development	8,055,000	5,467,000	20,242,000	16,265,000
Selling, general and administrative	7,989,000	5,229,000	21,141,000	18,451,000
Total costs and operating expenses	20,020,000	13,452,000	52,151,000	42,182,000
Income (loss) from operations	(10,036,000)	1,418,000	(23,850,000)	(3,314,000)
Interest income	28,000	12,000	96,000	40,000
Other income (expenses)	(68,000)	7,000	(80,000)	(39,000)
Income (loss) before income taxes	(10,076,000)	1,437,000	(23,834,000)	(3,313,000)
Provision for (benefit from) income taxes	150,000	0	132,000	(15,000)
Net income (loss)	$ (10,226,000)	$ 1,437,000	$ (23,966,000)	$ (3,298,000)
Net income (loss) per share, basic (usd per share)	$ (0.21)	$ 0.04	$ (0.53)	$ (0.08)
Net income (loss) per share, diluted (usd per share)	$ (0.21)	$ 0.03	$ (0.53)	$ (0.08)
Weighted average common stock shares used in computing net income (loss) per share, basic (shares)	48,147	40,940	45,568	40,504
Weighted average common stock shares used in computing net income (loss) per share, diluted (shares)	48,147	42,134	45,568	40,504