Summary of significant accounting policies - Additional Information (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) Customer $ / shares	Mar. 31, 2022 USD ($) Customer $ / shares
Financing Receivable Impaired [Line Items]
Number of customer accounted for accounts receivable or revenue | Customer	0	0
Advertising expenses	$ 100	$ 0
Decrease net loss	(11,343)	(10,925)
Improve in operating loss	$ (10,310)	$ (10,300)
Improve in loss per share | $ / shares	$ (0.12)	$ (0.38)
Customer Usage Agreements
Financing Receivable Impaired [Line Items]
Decrease in depreciation expense	$ 300
Decrease net loss	$ 300
Customer Usage Agreements | Maximum
Financing Receivable Impaired [Line Items]
Property and equipment, useful life	5 years
Customer Usage Agreements | Minimum
Financing Receivable Impaired [Line Items]
Property and equipment, useful life	3 years