Summary of Significant Accounting Policies - Anti-dilutive Securities (Details) - shares shares in Thousands |
9 Months Ended | |
---|---|---|
Sep. 30, 2017 |
Sep. 30, 2016 |
|
Stock options to purchase common stock | ||
Anti-dilutive securities excluded from computations of diluted weighted-average common shares outstanding | ||
Potentially dilutive securities excluded from computations of diluted weighted-average shares outstanding | 8,601 | 7,306 |
Unvested RSUs | ||
Anti-dilutive securities excluded from computations of diluted weighted-average common shares outstanding | ||
Potentially dilutive securities excluded from computations of diluted weighted-average shares outstanding | 47 | 89 |