Fair Value of Financial Instruments - Schedule of Derivative Warrant Liabilities (Detail) (USD $)				6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013		Jun. 30, 2014 Significant Unobservable Inputs (Level 3) [Member] Warrants Derivative Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Beginning balance at January 1, 2014	$ 3,559,227	$ 3,017,142	[1]	$ 3,017,142
Issuance of warrants with derivative liabilities				5,584,865
Changes in estimated fair value				(5,042,780)
Ending balance at June 30, 2014	$ 3,559,227	$ 3,017,142	[1]	$ 3,559,227

[1] Derived from the audited balance sheet as of December 31, 2013