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Summary of Operations and Significant Accounting Policies (Details 7) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
VAR Plan |  |  |  |
Equity-Based Compensation |  |  |  |
Expected dividend yield (as a percent) |  |  | 0.00% |
Stock Option |  |  |  |
Equity-Based Compensation |  |  |  |
Expected dividend yield (as a percent) | 0.00% | 0.00% | 0.00% | 0.00%
Stock Option | 2012 Plan |  |  |  |
Equity-Based Compensation |  |  |  |
Vesting period |  |  | 4 years |
Restricted stock units | 2012 Plan |  |  |  |
Equity-Based Compensation |  |  |  |
Vesting period |  |  | 3 years |
Employee stock purchase plan | 2012 ESPP |  |  |  |
Equity-Based Compensation |  |  |  |
Vesting period |  |  | 6 months |

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