Acquisitions - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		12 Months Ended	128 Months Ended
	Oct. 21, 2011	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2013
Business Acquisition [Line Items]
Obligation to pay royalties		later of (i) the expiration of the last to expire patent right related to such product candidate that was transferred in the Transaction and (ii) ten years after the first commercial sale of such product candidate.
Net present value of contingent consideration	$ 84,935
Contingent consideration - fair value adjustments				1,400,000	1,421,652
Roche Madison Inc
Business Acquisition [Line Items]
Issue of promissory note to Roche	50,000
Issue of Common Stock	1,288,158
Applicable out-license term		90 days			90 days
Percentage of royalty liability		3.00%			3.00%
Cash payments to Roche, minimum		2,500,000			2,500,000
Cash payments to Roche, maximum		$ 6,000,000			$ 6,000,000