Meda License, Development and Supply Agreements - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended				1 Months Ended	12 Months Ended	1 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 ONSOLIS[Member]	Sep. 30, 2012 ONSOLIS[Member]	Oct. 31, 2012 EU [Member]	Dec. 31, 2012 EU [Member]	Oct. 31, 2009 US [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]	Sep. 30, 2013 Milestones [Member] EU [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Patent expiration year			2020
Aggregate milestones and services revenue recognized	$ 2,072,590	$ 1,875,446	$ 5,603,516	$ 34,677,583			$ 17,500,000		$ 59,700,000	$ 2,500,000	$ 2,500,000
Remaining deferred revenue related to the EU Media arrangement milestones												1,300,000
Additional revenues in milestones								5,000,000
Product royalty revenues	924,272		1,779,373		1,800,000	0
Cost of product royalties	$ 643,486	$ 375,000	$ 1,708,693	$ 1,125,000	$ 1,700,000	$ 1,100,000
Shelf life of the product			24 months