Income Taxes - Components of deferred income tax assets and liabilities (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
In-process research and development	$ 346,801
Net operating loss carry forward	407,398	15,994,583
R&D credit	2,584	52,600
Deferred tax assets gross	756,783	16,047,183
Less: valuation allowance	(756,783)	(16,047,183)
Deferred tax assets, net