Effects of Restatement on Consolidated Balance Sheet (Detail) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Current liabilities:
Accounts payable	$ 2,171,366	$ 1,175,462
Accrued liabilities	488,688	359,715
Convertible revolving credit facility, net of discounts		160,794
Convertible debt		772,500
Total current liabilities	7,660,055	4,527,548
Convertible debt, net of discount
Fair value of 10% convertible preferred stock warrants	140,458	487,555
Total liabilities	7,800,513	5,015,103
Commitments and contingencies
Stockholders' deficit:
Common Stock Value	26,869,774	24,410,071
Accumulated deficit	(32,785,857)	(29,645,934)
Total stockholders' deficit	(5,916,083)	(5,235,863)
Total liabilities and stockholders' deficit	7,685,365	5,541,996
Debt Conversion
Current liabilities:
Derivative liability		113,271
Warrant
Current liabilities:
Derivative liability		1,875,463
Bonus Warrants
Current liabilities:
Derivative liability		70,343
10% Convertible Preferred Stock
Current liabilities:
Temporary Equity	5,800,935	5,520,256
Redeemable Common Stock
Current liabilities:
Temporary Equity		242,500
As Previously Reported
Current liabilities:
Accounts payable		1,175,462
Accrued liabilities		359,715
Convertible revolving credit facility, net of discounts		160,794
Convertible debt		566,785
Total current liabilities		4,251,490
Convertible debt, net of discount
Fair value of 10% convertible preferred stock warrants		487,555
Total liabilities		4,739,045
Commitments and contingencies
Stockholders' deficit:
Common Stock Value		23,660,071
Accumulated deficit		(28,619,876)
Total stockholders' deficit		(4,959,805)
Total liabilities and stockholders' deficit		5,541,996
As Previously Reported | Debt Conversion
Current liabilities:
Derivative liability		113,271
As Previously Reported | Warrant
Current liabilities:
Derivative liability		1,875,463
As Previously Reported | 10% Convertible Preferred Stock
Current liabilities:
Temporary Equity		5,520,256
As Previously Reported | Redeemable Common Stock
Current liabilities:
Temporary Equity		242,500
Adjustments
Current liabilities:
Total current liabilities		276,058
Convertible debt, net of discount
Total liabilities		276,058
Commitments and contingencies
Stockholders' deficit:
Total stockholders' deficit		(276,058)
Adjustments | Derivative Liability Adjustments For Fair Value As Of Amendment Date | Bonus Warrants
Current liabilities:
Derivative liability		797,185	[1]
Adjustments | Derivative Liability Adjustments For Change In Fair Value | Bonus Warrants
Current liabilities:
Derivative liability		(492,111)	[2]
Adjustments | Derivative Liability Adjustments For Fair Value At Date Of Issuance | Bonus Warrants
Current liabilities:
Derivative liability		(234,731)	[3]
Adjustments | Convertible Debt Adjustments To Reverse Improper Recording Of Debt Discount
Current liabilities:
Convertible debt		600,000	[4]
Adjustments | Convertible Debt Adjustments To Reverse Improper Recording And Amortization Of Debt Discount
Current liabilities:
Convertible debt		(394,285)	[5]
Adjustments | Common Stock Adjustments To Record Difference Between Reacquisition Price And Net Carrying Amount
Stockholders' deficit:
Common Stock Value		1,350,000	[6]
Adjustments | Common Stock Adjustments To Reverse Improper Recording Of Debt Discount
Stockholders' deficit:
Common Stock Value		(600,000)	[4]
Adjustments | Common Stock Adjustments To Reverse Incorrect Recording Of Fair Value At Issuance
Stockholders' deficit:
Common Stock Value		(234,731)	[7]
Adjustments | Common Stock Adjustments For Fair Value At Date Of Issuance
Stockholders' deficit:
Common Stock Value		234,731	[3]
Adjustments | Accumulated Deficit Adjustments To Record Difference Between Reacquisition Price And Net Carrying Amount
Stockholders' deficit:
Accumulated deficit		(1,350,000)	[6]
Adjustments | Accumulated Deficit Adjustments To Reverse Improper Recording And Amortization Of Debt Discount
Stockholders' deficit:
Accumulated deficit		394,285	[5]
Adjustments | Accumulated Deficit Adjustments For Fair Value As Of Amendment Date
Stockholders' deficit:
Accumulated deficit		(797,185)	[1]
Adjustments | Accumulated Deficit Adjustments For Change In Fair Value
Stockholders' deficit:
Accumulated deficit		492,111	[2]
Adjustments | Accumulated Deficit Adjustments To Reverse Incorrect Recording Of Fair Value At Issuance
Stockholders' deficit:
Accumulated deficit		$ 234,731	[7]

[1] 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.

[2] 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.

[3] to record the fair value of bonus warrants at date of issuance.

[4] to reverse the improper recording of debt discount.

[5] to reverse the improper recording of and amortization of debt discount.

[6] 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.

[7] to reverse incorrect recording of the fair value of bonus warrants at issuance.