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7. Stockholders equity (Details 4)	Dec. 31, 2012
Stockholders Equity Details 4
Stock options outstanding	1,133,462
Stock options available for future grant under the 2011 Plan	366,538
Warrants	3,547,100
Total common shares reserved for future issuance	5,047,100

- 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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