Stockholders' equity (deficit) - Summary of our Outstanding and Exercisable Warrants and Related Transactions (Details) - Warrant [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Jan. 01, 2023
Class Of Warrant Or Right [Line Items]
Beginning balance, Warrants	536
Exercised, Warrants	(310)
Expired, Warrants	(2)
Ending balance, Warrants	225	536
Beginning balance, Weighted Average Exercise Price	$ 13.1
Ending balance, Weighted Average Exercise Price	$ 31.26	$ 13.1
Warrants, Aggregate Intrinsic Value	$ 467		$ 2,427
Warrants, Weighted Average Remaining Contractual Life (in Years)	8 years 6 months	9 years 3 months 18 days