Revenue - Summary of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Product sales, net	$ 45,922	$ 36,826	$ 86,939	$ 72,678
NexoBrid revenue	0	220	0	442
Total revenue	45,922	37,046	86,939	73,120
Accounting Standards Update 2014-09 | Change in estimates related to prior periods
Disaggregation of Revenue [Line Items]
Product sales, net	1,119	1,733	369	1,898
M A C I Implants and kits
Disaggregation of Revenue [Line Items]
Product sales, net	36,336	28,613	70,526	54,607
Through Intermediary | MACI implants and kits | Contract rate
Disaggregation of Revenue [Line Items]
Product sales, net	22,377	15,714	45,331	31,009
Through Intermediary | MACI implants and kits | Time-and-materials contract
Disaggregation of Revenue [Line Items]
Product sales, net	4,015	4,295	8,004	7,803
Time-and-materials contract | MACI implants and kits | Time-and-materials contract
Disaggregation of Revenue [Line Items]
Product sales, net	1,045	570	1,538	1,441
Provider or Facility | MACI implants and kits | Contract rate
Disaggregation of Revenue [Line Items]
Product sales, net	7,252	5,756	14,222	11,390
Provider or Facility | NexoBrid
Disaggregation of Revenue [Line Items]
NexoBrid revenue	0	220	0	442
Directly to consumer | Biopsy kits
Disaggregation of Revenue [Line Items]
Product sales, net	528	545	1,062	1,066
Directly to consumer | Epicel
Disaggregation of Revenue [Line Items]
Product sales, net	$ 9,586	$ 8,213	$ 16,413	$ 18,071