Related party transactions (Details) - Affiliated Entity - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Naspers Ltd. and Other Entity
Related Party Transaction [Line Items]
Revenue from related parties	$ 1,500,000	$ 1,300,000	$ 800,000
Accounts receivable, related parties	100,000	300,000
Certain Vendors
Related Party Transaction [Line Items]
General and administrative expenses, related party	900,000	300,000	$ 0
Accounts payable, related parties	$ 100,000	$ 0