Meda License, Development and Supply Agreements - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended				1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended	12 Months Ended		12 Months Ended	1 Months Ended	0 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Onsolis [Member]	Sep. 30, 2013 Onsolis [Member]	Oct. 31, 2009 U.S. [Member]	Sep. 30, 2014 U.S. [Member]	Oct. 31, 2012 EU [Member]	Sep. 30, 2014 EU [Member]	Dec. 31, 2012 EU [Member]	Sep. 30, 2014 Milestones [Member] EU [Member]	Dec. 31, 2013 Meda License Development and Supply Agreement [Member]	Oct. 31, 2012 Meda License Development and Supply Agreement [Member] EU [Member]	May 21, 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	$ 512,774	$ 2,072,590	$ 22,471,502	$ 5,603,516			$ 59,700,000		$ 17,500,000					$ 2,500,000	$ 2,500,000
Remaining deferred revenue related to the EU Media arrangement milestones												900,000
Additional revenues in milestones											5,000,000
Product royalty revenues	11,832	924,272	1,857,920	1,779,373	1,900,000	1,800,000							1,800,000
Cost of product sales	462,802	643,486	1,875,365	1,708,693	1,900,000	1,700,000
Estimated portion of upfront payments								$ 1,100,000		$ 100,000
Shelf life of the product			24 months
Period for application review			6 months