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Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2017
Equity [Abstract] |
Schedule of reserved shares of common stock for issuance | The Company had reserved shares of common stock for issuance as follows:
| September 30, 2017 |  | December 31, 2016
Stock options and restricted stock units issued and outstanding | 6,318,932 |  |  | 5,251,832 |
Stock options and restricted stock units available for grant under stock option plans | 1,102,427 |  |  | 887,724 |
Common stock available for the Employee Stock Purchase Plan | 456,002 |  |  | 609,053 |
Total | 7,877,361 |  |  | 6,748,609 |

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- Definition Tabular disclosure of number of common shares reserved for future issuance. + References No definition available. + Details
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