Warrant Activity (Detail) (Warrant, USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Warrant
Number of Shares Issuable
Balance, Beginning	27,353,151	5,452,141
Granted	14,875,004	22,048,510
Exercised	(300)	0
Cancelled	(632,200)	(147,500)
Balance, Ending	41,595,655	27,353,151
Weighted Average Exercise Price
Balance, Beginning	$ 0.76	$ 1.18
Granted	$ 0.60	$ 0.67
Exercised	$ 0.88	$ 0
Cancelled	$ 1.56	$ 2.25
Balance, Ending	$ 0.69	$ 0.76