Net loss per common share - Schedule of Earnings Per Share, Basic and Diluted, Two Class Method (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator:
Net loss	$ (29,132)	$ (10,317)	$ (53,045)	$ (90,616)
Net loss allocated to common shareholders	(29,132)	(10,317)	(53,045)	(90,616)
Net loss allocated to common shareholders	$ (29,132)	$ (10,317)	$ (53,045)	$ (90,616)
Denominator:
Weighted average common shares issued, basic (in shares)	43,570,438	42,647,967	43,348,412	42,376,392
Weighted average common shares outstanding, basic (in shares)	43,570,438	42,647,967	43,348,412	42,376,392
Weighted average common shares issued, diluted (in shares)	43,570,438	42,647,967	43,348,412	42,376,392
Weighted average common shares outstanding, diluted (in shares)	43,570,438	42,647,967	43,348,412	42,376,392
Net loss per share attributable to common shareholders, basic (in dollars per share)	$ (0.67)	$ (0.24)	$ (1.22)	$ (2.14)
Net loss per share attributable to common shareholders, diluted (in dollars per share)	$ (0.67)	$ (0.24)	$ (1.22)	$ (2.14)