Condensed Consolidated Statements of Operations and Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Product revenue	$ 17,756,000	$ 13,179,399	$ 44,230,840	$ 38,542,378
Licensing, milestone and contract revenue	699,817	689,815	2,103,508	2,292,723
Total revenue	18,455,817	13,869,214	46,334,348	40,835,101
Operating expenses:
Cost of product revenue	7,394,922	6,108,502	19,655,288	17,123,930
Research & development	1,531,355	1,774,623	4,638,175	5,486,920
Selling, general & administrative	4,712,178	3,908,452	12,989,268	13,164,775
Total operating expenses	13,638,455	11,791,577	37,282,731	35,775,625
Income from operations	4,817,362	2,077,637	9,051,617	5,059,476
Interest income (expense), net	(46,269)	(39,888)	(132,471)	(149,095)
Income before income taxes	4,771,093	2,037,749	8,919,146	4,910,381
Provision for income taxes	1,794,575	853,485	3,335,576	1,945,086
Net income	2,976,518	1,184,264	5,583,570	2,965,295
Basic net income per share:
Net income	$ 0.23	$ 0.09	$ 0.44	$ 0.23
Basic weighted average common shares outstanding	12,817,910	12,633,405	12,744,471	12,615,705
Diluted net income per share:
Net income	$ 0.22	$ 0.09	$ 0.41	$ 0.22
Diluted weighted average common shares outstanding	13,765,533	13,622,603	13,729,835	13,598,886
Net income	2,976,518	1,184,264	5,583,570	2,965,295
Other comprehensive income (loss)
Foreign currency translation adjustment	(1,576,131)	3,082,286	768,731	(1,796,614)
Comprehensive income	$ 1,400,387	$ 4,266,550	$ 6,352,301	$ 1,168,681