Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Product revenue	$ 21,267,156	$ 20,067,407	$ 35,618,561	$ 34,561,896
Licensing, milestone and contract revenue	5,007,504	760,970	24,666,386	1,513,492
Total revenue	26,274,660	20,828,377	60,284,947	36,075,388
Operating expenses:
Cost of product revenue	5,332,913	6,311,332	9,693,932	11,152,502
Research & development	1,873,158	1,829,052	4,160,873	3,411,962
Selling, general & administrative	3,865,876	3,400,679	7,356,861	7,347,793
Restructuring credits		(111,178)		(246,785)
Total operating expenses	11,071,947	11,429,885	21,211,666	21,665,472
Income from operations	15,202,713	9,398,492	39,073,281	14,409,916
Interest income (expense), net	5,935	(36,381)	6,402	(75,939)
Income before income taxes	15,208,648	9,362,111	39,079,683	14,333,977
Provision for income taxes	5,906,298	3,467,219	14,747,080	5,371,083
Net income	9,302,350	5,894,892	24,332,603	8,962,894
Basic net income per share:
Net income (in Dollars per share)	$ 0.63	$ 0.44	$ 1.67	$ 0.67
Basic weighted average common shares outstanding (in Shares)	14,687,747	13,510,573	14,559,917	13,459,049
Diluted net income per share:
Net income (in Dollars per share)	$ 0.60	$ 0.40	$ 1.57	$ 0.62
Diluted weighted average common shares outstanding (in Shares)	15,492,732	14,578,927	15,487,432	14,484,978
Net income	9,302,350	5,894,892	24,332,603	8,962,894
Other comprehensive income (loss)
Foreign currency translation adjustment	(190,739)	340,095	(216,855)	(409,355)
Comprehensive income	$ 9,111,611	$ 6,234,987	$ 24,115,748	$ 8,553,539