Other balance sheet items - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Impairment losses	$ 0		$ 0
Amortization expense for intangible assets	$ 800,000	$ 400,000	$ 2,300,000	$ 1,100,000