Government contributions - Funding and Associated Conditional Repayments (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Government Assistance [Line Items]
Accounts Receivable	$ 44,449	$ 36,051
Deferred Government Contribution	131,593	103,027
Accounts Receivable, Current	31,632
Deferred Government Contribution, Current	7,407
Accounts Receivable, Long-Term	12,817
Deferred Government Contribution, Long-term	$ 124,186	95,915
Government Assistance Statement Of Income Or Comprehensive Income Extensible Enumeration Not Disclosed Flag	Government Contribution 1
Transaction duration	8 years
Government Contribution 1
Government Assistance [Line Items]
Accounts Receivable	$ 13,872
Deferred Government Contribution	76,938
Other Government Grants
Government Assistance [Line Items]
Accounts Receivable	0
Deferred Government Contribution	987
CANADA | Government Contribution 2
Government Assistance [Line Items]
Accounts Receivable	12,497
Deferred Government Contribution	31,002
BRITISH COLUMBIA | Government Contribution 2
Government Assistance [Line Items]
Accounts Receivable	18,080
Deferred Government Contribution	$ 22,666
Transaction duration	5 years
Non-repayable
Government Assistance [Line Items]
Deferred Government Contribution	$ 14,284	14,811
Deferred Government Contribution, Current	4,213
Deferred Government Contribution, Long-term	10,071
Non-repayable | Government Contribution 1
Government Assistance [Line Items]
Deferred Government Contribution	7,524
Non-repayable | Other Government Grants
Government Assistance [Line Items]
Deferred Government Contribution	987
Non-repayable | CANADA | Government Contribution 2
Government Assistance [Line Items]
Deferred Government Contribution	5,773
Non-repayable | BRITISH COLUMBIA | Government Contribution 2
Government Assistance [Line Items]
Deferred Government Contribution	0
Conditionally Repayable
Government Assistance [Line Items]
Deferred Government Contribution	92,080	71,796
Deferred Government Contribution, Current	3,194
Deferred Government Contribution, Long-term	88,886
Conditionally Repayable | Government Contribution 1
Government Assistance [Line Items]
Deferred Government Contribution	69,414
Conditionally Repayable | Other Government Grants
Government Assistance [Line Items]
Deferred Government Contribution	0
Conditionally Repayable | CANADA | Government Contribution 2
Government Assistance [Line Items]
Deferred Government Contribution	0
Conditionally Repayable | BRITISH COLUMBIA | Government Contribution 2
Government Assistance [Line Items]
Deferred Government Contribution	22,666
Repayable
Government Assistance [Line Items]
Deferred Government Contribution	25,229	$ 16,420
Deferred Government Contribution, Current	0
Deferred Government Contribution, Long-term	25,229
Repayable | Government Contribution 1
Government Assistance [Line Items]
Deferred Government Contribution	0
Repayable | Other Government Grants
Government Assistance [Line Items]
Deferred Government Contribution	0
Repayable | CANADA | Government Contribution 2
Government Assistance [Line Items]
Deferred Government Contribution	25,229
Repayable | BRITISH COLUMBIA | Government Contribution 2
Government Assistance [Line Items]
Deferred Government Contribution	$ 0