Loans payable - Components (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Loans payable
Loan payable, beginning of period	$ 29,844	$ 13,624
Contributions	20,000	16,786
Payments	(398)	(399)
Interest expense	606	0
Final fee on Venture Loan	583	0
Foreign exchange (gain) loss	(452)	(167)
Loan payable, end of period	50,183	29,844
Discount
Discount, beginning of period	(17,391)	(11,948)
Additional contribution discount	(130)	(7,167)
Interest expense	1,349	1,728
Foreign exchange (gain) loss	245	(4)
Discount, end of period	(15,927)	(17,391)
Total loans payable	34,256	12,453
Current portion of equipment financing	21,353	220
Loans payable, noncurrent	$ 12,903	$ 12,233