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Stock-based compensation (Tables)
 6 Months Ended
Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of stock-based compensation expense
Stock-based compensation expense for the three and six months ended June 30, 2024 and 2023 was classified in the Company’s condensed consolidated statement of operations and comprehensive loss as follows (in thousands):
 Three Months Ended June 30,Six Months Ended June 30,
 2024202320242023
Stock-based compensation expense:  
Research and development$2,465 $2,644 $4,702 $5,227 
General and administrative3,916 3,781 7,894 7,449 
Total stock-based compensation expense$6,381 $6,425 $12,596 $12,676