Net loss per share - Schedule of basic and diluted loss per share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Numerator:
Net loss	$ (105,316)	$ (132,493)
Denominator:
Weighted-average number of shares - basic (in shares)	69,372,993	49,640,505
Weighted-average number of shares - diluted (in shares)	69,372,993	49,640,505
Net loss per share — diluted (in dollars per share)	$ (1.52)	$ (2.67)
Net loss per share — basic (in dollars per share)	$ (1.52)	$ (2.67)