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Stockholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2017
Equity [Abstract] |
Common Stock are Reserved for Future Issuance | Shares of common stock for future issuance are reserved for as follows (in thousands):
| As of June 30, 2017
Warrants outstanding | 19,557 |
Stock options outstanding | 505 |
Options reserved for future issuance under the Company’s 2016 Incentive Plan | 466 |
Shares reserved for future issuance under the Employee Stock Purchase Plan | 17 |
Total reserved for future issuance | 20,545 |

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