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Commitment and Contingencies (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Commitments and contingencies |  |  |
Purchase commitments expects to incur in next year | $ 1,100 |  |
Harvard University | License agreements |  |  |
Commitments and contingencies |  |  |
Royalty expense | 0 | $ 0 | $ 0
Tufts | License agreements |  |  |
Commitments and contingencies |  |  |
Royalty expense | $ 1,500 | $ 2,100 | $ 1,700

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