Loss per share - Schedule of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2026	Jun. 30, 2026	Mar. 31, 2026	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2026	Sep. 30, 2025
Earnings Per Share [Abstract]
Net loss	$ (26,145)	$ (20,750)	$ (48,287)	$ (9,376)	$ (11,737)	$ (11,759)	$ (95,182)	$ (32,872)
Weighted average shares outstanding
Basic (in shares)	93,174,915			42,453,570			91,485,620	31,726,271
Diluted (in shares)	93,174,915			42,453,570			91,485,620	31,726,271
Net loss per common share, basic (in dollars per share)	$ (0.28)			$ (0.22)			$ (1.04)	$ (1.04)
Net loss per common share, diluted (in dollars per share)	$ (0.28)			$ (0.22)			$ (1.04)	$ (1.04)