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Stock-based compensation (Tables)
 9 Months Ended
Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Summary of Stock-Based Compensation Expense by Award Type
Stock-based compensation expense recognized by award type was as follows (in thousands):
For the three months ended September 30,For the nine months ended September 30,
2024202320242023
Stock options$881 $2,655 $3,782 $9,237 
Restricted stock units1,748 7,046 5,840 17,697 
Employee Stock Purchase Plan14 99 90 272 
$2,643 $9,800 $9,712 $27,206 
Schedule of Stock-Based Compensation Expense by Classification
Stock-based compensation expense by classification included within the condensed consolidated statements of operations and comprehensive loss was as follows (in thousands):
For the three months ended September 30,For the nine months ended September 30,
2024202320242023
Research and development$75 $3,812 $2,070 $10,802 
Selling, general and administrative2,568 5,988 6,605 16,404 
Restructuring expenses— — 1,037 — 
$2,643 $9,800 $9,712 $27,206