Employee benefit plans - Allocation of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense		$ 7,372	$ 10,017	$ 23,933	$ 31,448
Share-based Payment Arrangement, Expense, Tax Benefit			2,300	0	7,100
Unearned stock-based compensation, expected recognition period	2 years 3 months 21 days
Cost of Revenue [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense		349	500	1,103	1,496
Research and Development [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense		3,669	4,713	11,950	14,381
Selling and Marketing Expense [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense		1,603	2,125	4,892	6,662
General and Administrative [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense		$ 1,751	$ 2,679	$ 5,988	$ 8,909