Meda License, Development and Supply Agreements - Additional Information (Detail) (USD $)	1 Months Ended		12 Months Ended					1 Months Ended		12 Months Ended				1 Months Ended	0 Months Ended
	May 31, 2012	Jan. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 ONSOLIS [Member]	Dec. 31, 2012 ONSOLIS [Member]	Oct. 31, 2009 US [Member]	Oct. 31, 2012 EU [Member]	Dec. 31, 2013 EU [Member]	Dec. 31, 2012 EU [Member]	Dec. 31, 2013 U.S. [Member]	Dec. 31, 2013 Milestones [Member] EU [Member]	Oct. 31, 2012 Meda License Development and Supply Agreement [Member] EU [Member]	May 31, 2012 Meda License Development and Supply Agreement [Member] EU [Member] ONSOLIS [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Patent expiration year			2020
Aggregate milestones and services revenue recognized			$ 6,799,838	$ 53,446,309	$ 318,800			$ 59,700,000	$ 17,500,000					$ 2,500,000	$ 2,500,000
Remaining deferred revenue related to the EU Media arrangement milestones		14,400,000											1,300,000
Additional revenues in milestones	15,000,000	30,000,000									5,000,000
Product royalty revenues			1,773,215	1,082,742	2,716,452	1,800,000	1,100,000
Cost of product royalties			2,082,183	1,909,785	1,756,629	2,100,000	1,900,000
Estimated portion of upfront payments										$ 100,000		$ 1,200,000
Shelf life of the product			24 months
Period for application review			6 months