Effects of Restatement on Consolidated Statements of Operations (Detail) (USD $)	3 Months Ended			6 Months Ended			12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011		Jun. 30, 2012	Jun. 30, 2011		Dec. 31, 2011
Loss from operations	$ (1,560,881)	$ (2,412,954)		$ (2,759,400)	$ (4,108,625)
Other expenses:
Interest expense	95,575	67,024		133,549	97,104
Amortization of debt discounts		249,002			367,428
Fair value of bonus warrants at grant date					(114,049)
Loss on debt extinguishment					1,350,000
Fair value of bonus warrants at debt extinguishment					797,185
Change in fair value of derivative liabilities	(129,574)	(48,187)		(126,579)	(359,561)
Total other expenses	169,472	267,839		380,523	2,252,156
Loss before provision for income taxes	(1,730,353)	(2,680,793)		(3,139,923)	(6,360,781)
Provision for income taxes
Net loss	(1,730,353)	(2,680,793)		(3,139,923)	(6,360,781)
Accretion of preferred dividends and beneficial conversion feature	(477,678)	(203,697)		(823,204)	(207,556)
Net loss attributable to common shareholders	(2,208,031)	(2,884,490)		(3,963,127)	(6,568,337)
Weighted average common shares - basic and diluted	26,070,061	24,082,234		25,850,191	23,773,725
Basic and diluted net loss per share	$ (0.08)	$ (0.12)		$ (0.15)	$ (0.28)
As Previously Reported
Loss from operations		(2,412,954)			(4,108,625)
Other expenses:
Interest expense		67,024			97,104
Amortization of debt discounts		465,909			670,049
Total other expenses		532,933			767,153
Loss before provision for income taxes		(2,945,887)			(4,875,778)
Provision for income taxes
Net loss		(2,945,887)			(4,875,778)
Accretion of preferred dividends and beneficial conversion feature		(203,697)			(207,556)
Net loss attributable to common shareholders		(3,149,584)			(5,083,334)
Weighted average common shares - basic and diluted		24,082,234			23,773,725
Basic and diluted net loss per share		$ (0.13)			$ (0.21)
Adjustments
Other expenses:
Amortization of debt discounts					(188,572)	[1]
Fair value of bonus warrants at grant date					(114,049)	[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		(48,187)	[5]		(359,561)	[6]
Total other expenses		(265,094)			1,485,003
Loss before provision for income taxes		265,094			(1,485,003)
Provision for income taxes
Net loss		265,094			(1,485,003)
Net loss attributable to common shareholders		265,094			(1,485,003)
Weighted average common shares - basic and diluted		24,082,234			23,773,725
Basic and diluted net loss per share		$ 0.01			$ (0.06)
Adjustments | Amortization Of Debt Discounts Reversal
Other expenses:
Amortization of debt discounts		102,858	[1]
Adjustments | Amortization Of Debt Discounts Reversal Of Fair Value Of Bonus Warrants
Other expenses:
Amortization of debt discounts		$ 114,049	[2]

[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.

[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.