Effect on Consolidated Balance Sheet (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2010
Current liabilities:
Accounts payable	$ 890,394	$ 1,175,462
Accrued liabilities	446,434	359,715
Notes payable		160,794
Derivative liability - conversion option	830,000	2,059,077
Convertible debt	0	933,294
Total current liabilities	2,166,828	4,527,548
Fair value of 10% convertible preferred stock warrants	81,716	487,555
Total liabilities	7,919,706	5,015,103
Commitments and contingencies
Temporary Equity	5,922,612	5,762,756
Stockholders' deficit:
Common stock, no par value; authorized, 100,000,000 shares; 25,007,261 shares issued and outstanding at December 31, 2011	27,103,454	24,410,071
Accumulated deficit	(35,079,061)	(29,645,934)
Total stockholders' deficit	(7,975,607)	(5,235,863)		(864,272)
Total liabilities and stockholders' deficit	5,866,711	5,541,996
Scenario, Previously Reported
Current liabilities:
Accounts payable		1,175,462
Accrued liabilities		359,715
Notes payable		160,794
Convertible debt		566,785
Total current liabilities		4,251,490
Fair value of 10% convertible preferred stock warrants		487,555
Total liabilities		4,739,045
Stockholders' deficit:
Common stock, no par value; authorized, 100,000,000 shares; 25,007,261 shares issued and outstanding at December 31, 2011		23,660,071
Accumulated deficit		(28,619,876)
Total stockholders' deficit		(4,959,805)
Total liabilities and stockholders' deficit		5,541,996
Restatement Adjustment
Current liabilities:
Recognized Gain On Change In Fair Value Of Derivative Liability		(492,111)	[1]
Recorded As Fair Value Of Bonus Warrants At Date Of Issuance		(234,731)	[2]
Convertible debt		600,000	[3]
Reverse Of Amortization Of Debt Discount		(394,285)	[4]
Total current liabilities		276,058
Total liabilities		276,058
Stockholders' deficit:
Common stock, no par value; authorized, 100,000,000 shares; 25,007,261 shares issued and outstanding at December 31, 2011		1,350,000	[5]
Reversed Improper Recording Of Debt Discount		(600,000)	[3]
Reversed Improper Recording Of Fair Value Of Bonus Warrants At Issuance		(234,731)	[6]
Recorded Fair Value Of Bonus Warrant At Date Of Issuance		234,731	[2]
Accumulated deficit		(1,350,000)	[5]
Reverse Improper Recording Of and Amortization Of Debt Discount		394,285	[4]
Record Fair Value Of Bonus Warrants As Of Amendment Date As Component Of Reacquisition Price Of New Debt		(797,185)	[7]
Recognized Gain On Change In Fair Value Of Derivative Liability Associated With Bonus Warrants At Period End		492,111	[1]
Reversed Improper Recording Of Fair Value Of Bonus Warrants At Issuances		234,731	[6]
Total stockholders' deficit		(276,058)
Total liabilities and stockholders' deficit		0
Debt Conversion
Current liabilities:
Derivative liability - conversion option		113,271
Debt Conversion | Scenario, Previously Reported
Current liabilities:
Derivative liability - conversion option		113,271
Warrant
Current liabilities:
Derivative liability - conversion option		1,875,463
Warrant | Scenario, Previously Reported
Current liabilities:
Derivative liability - conversion option		1,875,463
Bonus Warrants
Current liabilities:
Derivative liability - conversion option		70,343
Bonus Warrants | Scenario, Previously Reported
Current liabilities:
Derivative liability - conversion option		0
Bonus Warrants | Restatement Adjustment
Current liabilities:
Derivative liability - conversion option		797,185	[7]
Convertible Preferred Stock | Scenario, Previously Reported
Current liabilities:
Temporary Equity		5,520,256
Common Shares | Scenario, Previously Reported
Current liabilities:
Temporary Equity		$ 242,500

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

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

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

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

[5] 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.

[6] to reverse the improper recording of the fair value of bonus warrants at issuance.

[7] 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.