Condensed Consolidated Statements of Operations and Comprehensive Income (unaudited) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Product revenue	$ 18,882,277	$ 15,414,681	$ 32,495,605	$ 26,474,840
Licensing, milestone and contract revenue	742,492	726,171	1,489,824	1,403,691
Total revenue	19,624,769	16,140,852	33,985,429	27,878,531
Operating expenses:
Cost of product revenue	8,084,226	6,655,804	14,497,707	12,260,366
Research & development	1,298,170	1,574,155	2,831,273	3,106,820
Selling, general & administrative	4,108,503	4,233,316	7,459,519	8,277,090
Total operating expenses	13,490,899	12,463,275	24,788,499	23,644,276
Income from operations	6,133,870	3,677,577	9,196,930	4,234,255
Interest income (expense), net	(49,129)	(45,281)	(100,332)	(86,202)
Income before income taxes	6,084,741	3,632,296	9,096,598	4,148,053
Provision for income taxes	2,347,873	1,349,655	3,447,611	1,541,001
Net income	3,736,868	2,282,641	5,648,987	2,607,052
Basic net income per share:
Net income	$ 0.28	$ 0.18	$ 0.43	$ 0.21
Basic weighted average common shares outstanding	13,262,023	12,725,216	13,212,424	12,707,143
Diluted net income per share:
Net income	$ 0.26	$ 0.17	$ 0.39	$ 0.19
Diluted weighted average common shares outstanding	14,443,794	13,739,836	14,302,439	13,741,337
Net income	3,736,868	2,282,641	5,648,987	2,607,052
Other comprehensive income
Foreign currency translation adjustment	(1,600,204)	595,200	(843,743)	2,344,862
Comprehensive income	$ 2,136,664	$ 2,877,841	$ 4,805,244	$ 4,951,914