Stockholders' equity (Details) - shares |
Sep. 30, 2016 |
Dec. 31, 2015 |
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| Stockholders Equity Details | ||
| Stock options issued and outstanding | 24,651,200 | 43,071,000 |
| Authorized for future option grants | 47,885,000 | 29,485,000 |
| Warrants outstanding | 6,275,000 | 8,380,000 |
| Total | 78,711,000 | 80,936,000 |
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- References No definition available.
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- Definition Number of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Aggregate number of common shares reserved for future issuance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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