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Income taxes - Schedule of Cash Flow, Supplemental Disclosures (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 USD ($)
Operating Loss Carryforwards [Line Items] |
Total income taxes paid | $ 1,404
Massachusetts |
Operating Loss Carryforwards [Line Items] |
U.S. state | 0
Other states |
Operating Loss Carryforwards [Line Items] |
U.S. state | 44
Sweden |
Operating Loss Carryforwards [Line Items] |
Foreign | 1,220
Other foreign jurisdictions |
Operating Loss Carryforwards [Line Items] |
Foreign | $ 140

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