Stockholders' equity - Common Stock (Details) - shares	Jun. 30, 2024	Dec. 31, 2023
Common stock
Number of shares reserved for future issuance (in shares)	17,583,202	14,736,953
Stock options
Common stock
Number of shares reserved for future issuance (in shares)	12,642,352	10,902,845
Restricted stock units
Common stock
Number of shares reserved for future issuance (in shares)	4,940,850	3,834,108