Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Product revenue	$ 23,675,696	$ 21,975,312	$ 62,088,410	$ 57,593,873
Licensing, milestone and contract revenue	5,561	80,111	16,732	24,746,497
Total revenue	23,681,257	22,055,423	62,105,142	82,340,370
Operating expenses:
Cost of product revenue	5,175,723	5,724,800	14,763,222	15,418,732
Research & development	2,061,689	1,999,867	5,971,771	6,160,740
Selling, general & administrative	3,308,731	4,044,538	10,301,886	11,401,399
Total operating expenses	10,546,143	11,769,205	31,036,879	32,980,871
Income from operations	13,135,114	10,286,218	31,068,263	49,359,499
Interest income, net	33,667	9,937	81,297	16,339
Income before income taxes	13,168,781	10,296,155	31,149,560	49,375,838
Provision for income taxes	4,788,916	4,125,355	11,434,581	18,872,435
Net income	$ 8,379,865	$ 6,170,800	$ 19,714,979	$ 30,503,403
Basic net income per share:
Net income (in dollars per share)	$ 0.56	$ 0.42	$ 1.32	$ 2.09
Basic weighted average common shares outstanding (in shares)	14,967,322	14,758,781	14,944,921	14,626,933
Diluted net income per share:
Net income (in dollars per share)	$ 0.55	$ 0.40	$ 1.29	$ 1.97
Diluted weighted average common shares outstanding (in shares)	15,315,808	15,434,875	15,310,758	15,469,237
Net income	$ 8,379,865	$ 6,170,800	$ 19,714,979	$ 30,503,403
Other comprehensive income (loss):
Unrealized gain (loss) on securities, net of tax	2,294	431	(904)	431
Foreign currency translation adjustment	257,521	(1,679,968)	(1,570,923)	(1,896,823)
Total other comprehensive income (loss)	259,815	(1,679,537)	(1,571,827)	(1,896,392)
Comprehensive income	$ 8,639,680	$ 4,491,263	$ 18,143,152	$ 28,607,011