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Stock-based compensation - Schedule of Classification of Stock-based Compensation (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Total stock-based compensation expense | $ 3,002 | $ 3,542 | $ 5,993 | $ 7,592
Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServicesSold |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Total stock-based compensation expense | 67 | 97 | 140 | 188
Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Total stock-based compensation expense | 1,596 | 1,746 | 3,136 | 3,907
Income Statement Location [Axis]: us-gaap:ResearchAndDevelopmentExpense |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Total stock-based compensation expense | 958 | 945 | 1,899 | 1,973
Income Statement Location [Axis]: us-gaap:SellingAndMarketingExpense |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Total stock-based compensation expense | $ 381 | $ 754 | $ 818 | $ 1,524

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