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Assets and Liabilities Measured at Fair Value - Significant Unobservable Inputs (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Contingent consideration payable | $ 12,668 | $ 21,417
Discount rate |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Contingent consideration payable | 12,668 | $ 21,417
Callidus Biopharma Inc | Clinical and regulatory milestones | ATB200 Pompe Program |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Contingent consideration payable | $ 12,668 |
Callidus Biopharma Inc | Clinical and regulatory milestones | Probability of achievement of milestones | ATB200 Pompe Program | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Contingent consideration, measurement input | 88.00% |
Callidus Biopharma Inc | Clinical and regulatory milestones | Discount rate | Discount rate | ATB200 Pompe Program | Probability weighted discounted cash flow |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Contingent consideration, measurement input | 11.20% |

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