Consolidated Statements of Operation (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Related Party Transaction [Line Items]
Net product revenues	$ 22,230,473	$ 17,977,608	$ 27,046,730
Royalties	3,459,852	2,970,980	1,252,382
Other revenues	138,052	22,113,433	17,377,185
Beneficial owner [Member]
Related Party Transaction [Line Items]
Net product revenues	4,304,519	3,201,464	2,015,584
Royalties	3,079,379	2,650,831	1,051,184
Other revenues	0	21,974,383	17,067,649
COST OF PRODUCT REVENUES
Cost of product revenues	3,913,199	2,874,873	1,357,098
OPERATING EXPENSES:
Research and development	$ 435,199	$ 3,196,601	$ 0