Income taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at the beginning of the year	$ 18,534	$ 971	$ 651
Decreases:
For current year’s tax positions	0	0	0
For prior years’ tax positions	(64)	0	0
Increases:
For current year’s tax positions	320	551	320
For prior years’ tax positions	22	17,012	0
Balance at the end of the year	$ 18,812	$ 18,534	$ 971