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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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