Net loss per share - Antidilutive (Details) - shares |
9 Months Ended | |
|---|---|---|
Sep. 30, 2022 |
Sep. 30, 2021 |
|
| Net loss per share | ||
| Total shares excluded from calculation (in shares) | 13,967,365 | 12,418,346 |
| Stock Options | ||
| Net loss per share | ||
| Total shares excluded from calculation (in shares) | 11,478,421 | 10,882,081 |
| Unvested restricted stock awards and units | ||
| Net loss per share | ||
| Total shares excluded from calculation (in shares) | 2,488,944 | 1,536,265 |