Investments and fair value measurements - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of strategic investment	$ 2,900,000	$ 0
Exercise price of warrants (in USD per share)		$ 0.196
Fair value of warrants		$ 200,000
Series A-1 Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Issuance of convertible preferred stock, net of issuance costs (in shares)		12,595