Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue
Net product sales	$ 55,618	$ 38,551	$ 148,978	$ 100,914
Royalty Revenue	1,140	776	3,464	2,007
Licensing revenue	52	35	187	857
Royalty revenues	1,140	776	3,464	2,007
Total revenue	56,810	39,362	152,629	103,778
Costs and expenses
Cost of product sales	3,428	2,248	8,214	5,628
Research and development	7,868	9,129	29,539	19,690
Selling, general and administrative	25,675	22,900	76,956	65,496
Total costs and expenses	36,971	34,277	114,709	90,814
Operating income	19,839	5,085	37,920	12,964
Other income (expense)
Interest income	379	169	1,073	419
Interest expense	(202)	(292)	(577)	(1,004)
Interest expense-non-recourse royalty liability	(1,004)	(998)	(3,564)	(2,530)
Changes in fair value of derivative liabilities	125	114	349	66
Loss on extinguishment of debt		(25)	(382)	(2,400)
Other (expense) income	(1)	5	(2)	30
Total other income (expense)	(703)	(1,027)	(3,103)	(5,419)
Earnings before income taxes	19,136	4,058	34,817	7,545
Income tax (benefit) expense	(42,690)	142	(42,085)	453
Net income	$ 61,826	$ 3,916	$ 76,902	$ 7,092
Income per common share:
Basic (in dollars per share)	$ 1.25	$ 0.08	$ 1.56	$ 0.15
Diluted (in dollars per share)	$ 1.18	$ 0.08	$ 1.48	$ 0.15
Weighted-average number of common shares outstanding:
Basic (in shares)	49,516,595	48,515,071	49,395,284	47,011,243
Diluted (in shares)	51,974,435	51,590,797	51,615,334	51,059,466