Effect on Consolidated Statement of Operations (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Loss from operations	$ (5,717,346)	$ (6,713,961)
Other expenses:
Interest expense	(376,980)	(156,645)
Amortization of debt discounts	(510,220)	(567,575)
Loss on debt extinguishment	0	(1,350,000)
Fair value of bonus warrants at debt extinguishment	0	(797,185)
Change in fair value of derivative liabilities	1,171,419	(1,377,960)
Total other expenses	284,219	(4,249,365)
Net loss	(5,433,127)	(10,963,326)
Accretion of preferred dividends and beneficial conversion feature	(1,666,950)	(1,049,975)
Net loss attributable to common shareholders	(7,100,077)	(12,013,301)
Weighted average common shares - basic and diluted	26,562,764	24,352,072
Basic and diluted net loss per share	$ (0.27)	$ (0.49)
Scenario, Previously Reported
Loss from operations		(6,713,961)
Other expenses:
Interest expense		156,645
Amortization of debt discounts		1,196,591
Loss on debt extinguishment		0
Fair value of bonus warrants at debt extinguishment		0
Change in fair value of derivative liabilities		1,870,071
Total other expenses		3,223,307
Net loss		(9,937,268)
Accretion of preferred dividends and beneficial conversion feature		(1,049,975)
Net loss attributable to common shareholders		(10,987,243)
Weighted average common shares - basic and diluted		24,352,072
Basic and diluted net loss per share		$ (0.45)
Restatement Adjustment
Other expenses:
Amortization of debt discounts		(394,285)	[1]
Reverse Impact Of Improper Recording Of Fair Value Of Bonus Warrants Upon Issuance		(234,731)	[2]
Loss on debt extinguishment		1,350,000	[3]
Fair value of bonus warrants at debt extinguishment		797,185	[4]
Change in fair value of derivative liabilities		(492,111)
Total other expenses		1,026,058
Net loss		(1,026,058)
Net loss attributable to common shareholders		$ (1,026,058)
Weighted average common shares - basic and diluted		24,352,072
Basic and diluted net loss per share		$ (0.04)

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

[2] to reverse the impact of the improper recording of the fair value of the Bonus Warrants upon issuance.

[3] 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.

[4] 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.