Derivative Liability and Fair Value Measurements (Schedule of Fair Value Level 3 Warrant Liabilities) (Detail) (USD $)	0 Months Ended	12 Months Ended
	Jun. 03, 2014	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible debt issued with an embedded conversion price adjustment provision	$ 1,938,988	$ 2,806,942
Extinguishment of liability upon conversion of debt		(500,261)
Warrant Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value -beginning of period		12,035,816	0
Warrants issue during period			9,067,283
Reclassification (reset expiration) of warrant liabilities to Additional Paid-in Capital			(526,245)
Reclassification of warrant exercises to Additional Paid-in Capital		(2,127,405)	(80,500)
Change in fair value for the period of warrant derivative liability		825,786	(3,575,278)
Convertible debt issued with an embedded conversion price adjustment provision		1,938,988
Extinguishment of liability upon conversion of debt		(500,261)
Change in fair value of debt conversion price adjustment for the period		1,368,215
Fair value - end of period		$ 13,541,138	$ 12,035,816