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[Extensible Enumeration] Leasehold improvements Leasehold Improvements [Member] Employee stock purchase plan and service-based stock options Employee Stock And Employee Stock Option [Member] Employee Stock And Employee Stock Option [Member] Diluted (in shares) Diluted weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Long-term investments Long-term Investments [Member] Long-term Investments [Member] Right-of-use asset and lease liability recognized Right-of-Use Asset Obtained in Exchange for Finance Lease Liability SOFR Secured Overnight Financing Rate (SOFR) [Member] Secured Overnight Financing Rate (SOFR) Change in estimates related to prior periods Change in Accounting Method Accounted for as Change in Estimate [Member] Revenue Revenue from Contract with Customer [Text Block] Expenditures for property and equipment Payments to Acquire Property, Plant, and Equipment Company Selected Measure Amount Company Selected Measure Amount Balance Sheet Location [Axis] Balance Sheet Location [Axis] Total assets Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Cover [Abstract] Cover [Abstract] M A C I Implants and kits MACI Implants And Kits [Member] MACI Implants And Kits Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Amortization of debt issuance costs Amortization of Debt Issuance Costs Contingent consideration License Agreement, Contingent Consideration License Agreement, Contingent Consideration Recurring Fair Value, Recurring [Member] Other long-term liabilities Other Liabilities, Noncurrent Non-NEOs Non-NEOs [Member] Short-term investments Short-Term Investments Construction in process Construction in Progress [Member] Total operating expenses Operating Expenses Consideration payment for license License Agreement, Consideration License Agreement, Consideration Net (decrease) increase in cash, cash equivalents, and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Non-PEO NEO Non-PEO NEO [Member] Provider or Facility Provider or Facility [Member] Provider or Facility [Member] Time-and-materials contract Time-and-Materials Contract [Member] Equity Component [Domain] Equity Component [Domain] Adjustment to Compensation: Adjustment to Compensation [Axis] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Debt Instrument [Line Items] Debt Instrument [Line Items] Basic (in shares) Basic weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Entity Current Reporting Status Entity Current Reporting Status Contract rate Fixed-Price Contract [Member] Loss from operations Operating Income (Loss) NexoBrid License and Supply Agreements License Agreement [Text Block] License Agreement [Text Block] Cash and cash equivalents Cash and Cash Equivalents [Member] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Statement Statement [Line Items] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Outstanding borrowings Long-Term Line of Credit Schedule of fair value of securities, not including cash Debt Securities, Available-for-Sale [Table Text Block] Name of Property [Axis] Name of Property [Axis] Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Product [Member]