Revenue - Summary of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Product sales, net	$ 41,017	$ 35,852
NexoBrid revenue	0	222
Total revenue	41,017	36,074
Accounting Standards Update 2014-09 | Change in estimates related to prior periods
Disaggregation of Revenue [Line Items]
Product sales, net	52	419
M A C I Implants and kits
Disaggregation of Revenue [Line Items]
Product sales, net	34,190	25,995
Through Intermediary | MACI implants and kits | Contract rate
Disaggregation of Revenue [Line Items]
Product sales, net	22,698	15,190
Through Intermediary | MACI implants and kits | Time-and-materials contract
Disaggregation of Revenue [Line Items]
Product sales, net	3,485	3,369
Time-and-materials contract | MACI implants and kits | Time-and-materials contract
Disaggregation of Revenue [Line Items]
Product sales, net	501	861
Provider or Facility | MACI implants and kits | Contract rate
Disaggregation of Revenue [Line Items]
Product sales, net	6,919	5,634
Provider or Facility | NexoBrid
Disaggregation of Revenue [Line Items]
NexoBrid revenue	0	222
Directly to consumer | Biopsy kits
Disaggregation of Revenue [Line Items]
Product sales, net	535	522
Directly to consumer | Epicel
Disaggregation of Revenue [Line Items]
Product sales, net	$ 6,827	$ 9,857