Changes in Liabilities with Significant Unobservable Inputs (Level 3) (Detail) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2014		Dec. 31, 2013
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 1,104,423		$ 2,335,560
Liability on issuance of debt and warrants	0		1,691,267
Change in estimated fair value	2,051,760	[1]	(2,922,404)
Elimination of liability on conversion	0
Ending Balance	3,156,183		1,104,423
Warrant Liability
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	803,484		1,730,044
Liability on issuance of debt and warrants	0		762,111
Change in estimated fair value	1,288,147	[1]	(1,688,671)
Elimination of liability on conversion	0
Ending Balance	2,091,631		803,484
Derivative Liability
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	300,939
Liability on issuance of debt and warrants	0
Change in estimated fair value	763,613	[1]
Elimination of liability on conversion	0
Ending Balance	$ 1,064,552

[1] Included in the Condensed Statements of Operation on the line “Change in fair value of derivative and warrant liabilities.”