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Fair value measurement - Contingent Consideration (Details) $ in Thousands, € in Millions |  | 2 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jul. 30, 2021 USD ($) | Jul. 30, 2021 EUR (€) | Sep. 30, 2021 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2021 EUR (€) | Jul. 30, 2021 EUR (€)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Contingent consideration |  |  | $ 23,781 | $ 23,781 |  |
Balance at September 30, 2021 |  |  | 23,781 | 23,781 |  |
Acquisition of Corlieve |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Contingent consideration | $ 23,950 |  | 23,781 | 23,781 |  | € 20.2
Fair value of contingent consideration |  |  | 23,800 | 23,800 | € 20.5 |
Amount recorded on Acquisition Date |  |  | 23,950 |  |  |
Change in fair value (included within research and development expenses) |  |  | 416 |  |  |
Currency translation effects |  |  | (585) |  |  |
Balance at September 30, 2021 | 23,950 | € 20.2 | 23,781 | $ 23,781 |  |
Acquisition of Corlieve | Maximum |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Contingent consideration payable upon achievement of contractually defined milestones | $ 212,400 |  |  |  |  | € 178.8
Acquisition of Corlieve | Increase Probability of Success |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Percentage of increase in Probability of Success | 5.00% | 5.00% |  | 5.00% |  |
Increase in fair market of contingent consideration | $ 1,900 |  |  | $ 1,900 |  |
Fair value of contingent consideration | 25,900 |  | 25,700 | 25,700 |  |
Acquisition of Corlieve | Reduction in the estimated timing of achieving such milestones |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Increase in fair market of contingent consideration | 1,300 |  |  | 1,300 |  |
Fair value of contingent consideration | $ 25,300 |  | $ 25,100 | $ 25,100 |  |
Term of reduction in achieving milestones | 6 months | 6 months |  | 6 months |  |

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