Income taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Line Items]
Net operating losses carried forward	$ 15,631	$ 7,256
Deferred tax assets, operating loss carryforwards, foreign	17,900	19,400	$ 19,400
Total unrecognized tax benefits	0	$ 0	$ 0
Australian Taxation Office
Income Tax Disclosure [Line Items]
Tax credit carryforward, amount	6,100
Canadian
Income Tax Disclosure [Line Items]
Net operating losses carried forward	27,100
Tax credit carryforward, amount	$ 8,500
Canadian | Minimum
Income Tax Disclosure [Line Items]
Tax years subject to income tax examinations	2020
Canadian | Maximum
Income Tax Disclosure [Line Items]
Tax years subject to income tax examinations	2024
Foreign
Income Tax Disclosure [Line Items]
Net operating losses carried forward	$ 17,900
Indefinite	8,400
Foreign | 2030
Income Tax Disclosure [Line Items]
2034	9,500
Foreign | 2037
Income Tax Disclosure [Line Items]
2034	$ 9,500