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Shares Reserved (Tables) | 12 Months Ended
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Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Common stock reserved for future issuance | Common stock reserved for future issuance was as follows:
|  | December 31,
|  | 2016 |  | 2015
Stock option grants outstanding (see Note 6) |  |  | 2,161,085 |  |  |  | 2,022,353 |
Reserved for future stock option grants (see Note 6) |  |  | 95,981 |  |  |  | 121,750 |
Reserved for note conversion (see Note 2) |  |  | 972,884 |  |  |  | 977,398 |
Reserved for exercise of outstanding warrants (see Note 7) |  |  | — |  |  |  | 169,335 |
|  |  | 3,229,950 |  |  |  | 3,290,836 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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