Condensed Consolidated Statements of Operations and Comprehensive Income (unaudited) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Product revenue	$ 14,494,489	$ 13,613,328
Licensing, milestone and contract revenue	752,522	747,332
Total revenue	15,247,011	14,360,660
Operating expenses:
Cost of product revenue	4,841,170	6,413,481
Research & development	1,582,910	1,533,103
Selling, general & administrative	3,947,114	3,351,016
Restructuring charges	(135,607)
Total operating expenses	10,235,587	11,297,600
Income from operations	5,011,424	3,063,060
Interest expense, net	(39,558)	(51,203)
Income before income taxes	4,971,866	3,011,857
Provision for income taxes	1,903,864	1,099,738
Net income	3,068,002	1,912,119
Basic net income per share:
Net income	$ 0.23	$ 0.15
Basic weighted average common shares outstanding	13,406,952	13,162,824
Diluted net income per share:
Net income	$ 0.21	$ 0.14
Diluted weighted average common shares outstanding	14,357,110	14,089,946
Net income	3,068,002	1,912,119
Other comprehensive income (loss)
Foreign currency translation adjustment	(749,450)	756,461
Comprehensive income	$ 2,318,552	$ 2,668,580