Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenue
Net product sales	$ 34,266	$ 27,609	$ 62,363	$ 36,604
Licensing revenue	786	2,066	822	2,152
Total revenue	35,052	29,675	63,185	38,756
Costs and expenses
Cost of product sales	1,762	1,661	3,380	2,155
Research and development	6,878	4,677	10,561	9,159
Selling, general and administrative	23,336	19,581	42,737	37,109
Total costs and expenses	31,976	25,919	56,678	48,423
Operating income (loss)	3,076	3,756	6,507	(9,667)
Other income (expense)
Interest income	137	85	250	187
Interest expense	(331)	(1,278)	(712)	(2,485)
Changes in fair value of derivative liabilities	1	678	(48)	1,355
Loss on extinguishment of debt	(241)	(39)	(2,375)	(1,732)
Other income	25		25
Total other income (expense)	(409)	(554)	(2,860)	(2,675)
Earnings (loss) before income taxes	2,667	3,202	3,647	(12,342)
Income tax expense	662		724
Net income (loss)	$ 2,005	$ 3,202	$ 2,923	$ (12,342)
Income (loss) per common share:
Basic	$ 0.04	$ 0.08	$ 0.06	$ (0.30)
Diluted	$ 0.03	$ 0.08	$ 0.06	$ (0.30)
Weighted-average number of common shares:
Basic (in shares)	47,911,932	42,056,285	46,246,866	41,595,232
Diluted (in shares)	52,273,549	42,372,137	47,687,992	41,595,232