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Basis of preparation of consolidated financial statements and material accounting policy information - Revenue (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Material Accounting Policies Table [Line Items] |  |  |
Revenue | $ 92,390,000 | $ 15,936,000 | $ 6,155,000
Bottom |  |  |
Material Accounting Policies Table [Line Items] |  |  |
Sample return period | 1 year |  |
Top of range |  |  |
Material Accounting Policies Table [Line Items] |  |  |
Consideration refundable period from the date of delivery, services upfront | 30 days |  |
Revenue from service |  |  |
Material Accounting Policies Table [Line Items] |  |  |
Revenue | $ 0 | $ 0 | $ 0

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