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Commitments and contingencies - Additional Information (Details) € in Millions, $ in Millions	Jul. 05, 2023 USD ($)	Dec. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jan. 24, 2023 USD ($)	Oct. 12, 2021 EUR (€)	Apr. 01, 2021 EUR (€)
Loss Contingencies [Line Items]
Milestone payment unpaid | €					€ 1
Medac
Loss Contingencies [Line Items]
Accounts receivable | €						€ 1
Term over which the royalty is to be paid		5 years
Minimum annual payments		$ 0.2
Lachman
Loss Contingencies [Line Items]
Loss contingency accrual			$ 0.9
Unpaid consulting fees				$ 0.9
Lachman | Subsequent Event [Member]
Loss Contingencies [Line Items]
Settlement amount	$ 0.9
Other Liabilities | Medac
Loss Contingencies [Line Items]
Loss contingency accrual			1.3
Other Noncurrent Liabilities | Medac
Loss Contingencies [Line Items]
Loss contingency accrual			1.1
Accrued Expenses | Medac
Loss Contingencies [Line Items]
Loss contingency accrual			$ 0.2

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