Balances of Derivative Liability (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Debt Instrument [Line Items]
Balance	$ 2,335,560		$ 0
Liability on issuance of debt and warrants	1,691,267		4,678,260
Change in fair value at year end	(2,814,765)	[1]	211,037	[1]
Elimination of liability on conversion	(107,639)		(2,553,737)
Balance	1,104,423		2,335,560
Warrant
Debt Instrument [Line Items]
Balance	1,730,044		0
Liability on issuance of debt and warrants	762,111		2,510,919
Change in fair value at year end	(1,688,671)	[1]	(780,875)	[1]
Elimination of liability on conversion	0		0
Balance	803,484		1,730,044
Conversion Feature
Debt Instrument [Line Items]
Balance	605,516		0
Liability on issuance of debt and warrants	929,156		2,167,341
Change in fair value at year end	(1,126,094)		991,912
Elimination of liability on conversion	(107,639)		(2,553,737)
Balance	$ 300,939		$ 605,516

[1] Included in the Statement of Operations on the line "Change in fair value of derivative liabilities."