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Income Taxes - Summary of Income Tax Provision (Benefit) from Income Taxes (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Federal
Current	$ 0us-gaap_CurrentFederalTaxExpenseBenefit	$ 0us-gaap_CurrentFederalTaxExpenseBenefit
Deferred	(6,333,053)	(1,306,714)
State
Current	0	0
Deferred	(2,739,746)	(224,232)
Total	(9,072,799)us-gaap_IncomeTaxExpenseBenefit	(1,530,946)us-gaap_IncomeTaxExpenseBenefit
Change in valuation allowance	9,072,799	1,530,946
Income tax provision (benefit)	$ 0	$ 0

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.