Income taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 115	$ (599)	$ 212	$ (4,937)
Effective income tax rate reconciliation, percent			(0.40%)
Effective income tax rate reconciliation, tax benefit, share-based payment arrangement, amount			$ 1,200
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	$ 48,200		$ 48,200