Stock Purchase Warrants (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Shares
Beginning Balance	5,632,971	11,716,346
Granted	1,400,000	1,600,000
Forfeited or expired	(4,552,971)	(8,002,375)
Exercised
Ending Balance	2,480,000	5,632,971
Weighted-Average Exercise Price
Beginning Balance	$ 0.51	$ 0.80
Granted	$ 0.2	$ 0.26
Forfeited or expired	$ 0.34	$ 0.88
Ending Balance	$ 0.66	$ 0.51

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Weighted average price of options that were either forfeited or expired.

+ References

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

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Net number of share options (or share units) granted during the period.

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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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