Income taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 5	$ (3,739)	$ 97	$ (4,338)
Effective income tax rate reconciliation, percent			(0.40%)
Effective income tax rate reconciliation, tax expense (benefit), share-based payment arrangement, amount			$ 400
Effective income tax rate reconciliation, at federal statutory income tax rate, without discrete items percent			0.40%
Effective income tax rate reconciliation, at federal statutory income tax rate, percent			21.00%
Deferred tax assets, valuation allowance	$ 44,100		$ 44,100