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v3.22.4

Summary of significant accounting policies (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 USD ($) segment $ / shares | Dec. 31, 2021 USD ($)
Segment information |  |
Number of operating segments | segment | 1 |
Pensions |  |
Current investment securities | $ 124,831,000 |
Current and non-current classification |  |
Operating cycle period | 12 months |
Pension benefits | Lexington |  |
Pensions |  |
Amount of employer matching contribution for every employee dollar contributed | $ 0.50 |
Lexington. | Pension benefits |  |
Pensions |  |
Amount contributed to plan (in dollars per share) | $ / shares | $ 1.00 |
Cash and Cash Equivalents |  |
Pensions |  |
Current investment securities | $ 21,200,000 | $ 0
Maximum | Pension benefits | Lexington |  |
Pensions |  |
Percent of employee gross pay for which the employer makes a matching contribution | 6.00% |
Leasehold improvements | Minimum |  |
Property, plant and equipment, net |  |
Estimated useful life (in years) | 10 years |
Leasehold improvements | Maximum |  |
Property, plant and equipment, net |  |
Estimated useful life (in years) | 15 years |
Laboratory equipment |  |
Property, plant and equipment, net |  |
Estimated useful life (in years) | 5 years |
Office equipment | Minimum |  |
Property, plant and equipment, net |  |
Estimated useful life (in years) | 3 years |
Office equipment | Maximum |  |
Property, plant and equipment, net |  |
Estimated useful life (in years) | 5 years |

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