Net Loss per Share - Common Stock Equivalents Excluded from Calculation of Diluted Net Loss Per Share (Details) - shares |
9 Months Ended | |
---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
|
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
Anti-dilutive securities (in shares) | 39,433,994 | 50,643,406 |
Stock options | ||
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
Anti-dilutive securities (in shares) | 37,261,817 | 48,962,655 |
Restricted common stock | ||
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
Anti-dilutive securities (in shares) | 0 | 21,564 |
Restricted common stock units | ||
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
Anti-dilutive securities (in shares) | 2,172,177 | 1,659,187 |