Condensed Consolidated Statements of Operations and Comprehensive Income (unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Product revenue	$ 14,055,440	$ 17,756,000	$ 46,551,045	$ 44,230,840
Licensing, milestone and contract revenue	711,171	699,817	2,200,995	2,103,508
Total revenue	14,766,611	18,455,817	48,752,040	46,334,348
Operating expenses:
Cost of product revenue	7,221,028	7,394,922	21,718,735	19,655,288
Research & development	1,217,086	1,531,355	4,048,359	4,638,175
Selling, general & administrative	3,601,737	4,712,178	11,061,256	12,989,268
Total operating expenses	12,039,851	13,638,455	36,828,350	37,282,731
Income from operations	2,726,760	4,817,362	11,923,690	9,051,617
Interest income (expense), net	(45,161)	(46,269)	(145,493)	(132,471)
Income before income taxes	2,681,599	4,771,093	11,778,197	8,919,146
Provision for income taxes	1,036,349	1,794,575	4,483,960	3,335,576
Net income	1,645,250	2,976,518	7,294,237	5,583,570
Basic net income per share:
Net income	$ 0.12	$ 0.23	$ 0.55	$ 0.44
Basic weighted average common shares outstanding	13,287,463	12,817,910	13,237,629	12,744,471
Diluted net income per share:
Net income	$ 0.11	$ 0.22	$ 0.51	$ 0.41
Diluted weighted average common shares outstanding	14,459,154	13,765,533	14,357,791	13,729,835
Net income	1,645,250	2,976,518	7,294,237	5,583,570
Other comprehensive income
Foreign currency translation adjustment	557,712	(1,576,131)	(286,031)	768,731
Comprehensive income	$ 2,202,962	$ 1,400,387	$ 7,008,206	$ 6,352,301