Balances of Derivative Liability (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Debt Instrument [Line Items]
Balance	$ 1,104,423		$ 2,335,560
Liability on issuance of debt and warrants			1,691,267
Change in fair value at year end	(42,584)	[1]	(2,814,765)	[1]
Elimination of liability on conversion			(107,639)
Balance	1,061,839		1,104,423
Warrant
Debt Instrument [Line Items]
Balance	803,484		1,730,044
Liability on issuance of debt and warrants			762,111
Change in fair value at year end	(38,526)		(1,688,671)
Elimination of liability on conversion			0
Balance	764,958		803,484
Conversion Feature
Debt Instrument [Line Items]
Balance	300,939		605,516
Liability on issuance of debt and warrants			929,156
Change in fair value at year end	(4,058)		(1,126,094)
Elimination of liability on conversion			(107,639)
Balance	$ 296,881		$ 300,939

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