Effects of Restatement on Consolidated Cash Flows (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011		Jun. 30, 2012	Jun. 30, 2011
Cash flow from operating activities:
Net loss	$ (2,680,793)		$ (3,139,923)	$ (6,360,781)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of convertible debt discount				298,400
Loss on debt extinguishment				1,350,000
Fair value of bonus warrants at debt extinguishment				797,185
Fair value of bonus warrants at grant date				(114,049)
Change in fair value of derivative liabilities - Bonus Warrants	(48,187)		(126,579)	(359,561)
Net cash used in operating activities			(2,542,644)	(3,435,727)
As Previously Reported
Cash flow from operating activities:
Net loss	(2,945,887)			(4,875,778)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of convertible debt discount				486,972
Net cash used in operating activities				(3,435,727)
Adjustments
Cash flow from operating activities:
Net loss	265,094			(1,485,003)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of convertible debt discount				(188,572)	[1]
Loss on debt extinguishment				1,350,000	[2]
Fair value of bonus warrants at debt extinguishment				797,185	[3]
Fair value of bonus warrants at grant date				(114,049)	[4]
Change in fair value of derivative liabilities - Bonus Warrants	$ (48,187)	[5]		$ (359,561)	[6]

[1] to reverse the improper amortization of debt discount.

[2] to record the difference between the reacquisition price of the new debt and the net carrying amount of the extinguished debt at the amendment date.

[3] to record the fair value of the bonus warrants as of the amendment date as a component of the reacquisition price of the new debt.

[4] to reverse the impact of the improper recording of the fair value of the bonus warrants upon issuance.

[5] to recognize the gain on the change in the fair value of the derivative liability associated with the bonus warrants for the period.

[6] to recognize the gain on the change in the fair value of the derivative liability associated with the bonus warrants for the six months ended June 30, 2011.