Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Product sales, net	$ 67,503	$ 57,905	$ 183,341	$ 161,848
Total revenue	67,503	57,905	183,341	161,848
Change in estimates related to prior periods
Disaggregation of Revenue [Line Items]
Product sales, net	798	1,026	1,853	2,345
M A C I Implants and kits
Disaggregation of Revenue [Line Items]
Product sales, net	55,662	44,656	155,416	128,973
Through Intermediary | MACI implants, kits, and instruments | Contract rate
Disaggregation of Revenue [Line Items]
Product sales, net	41,090	31,637	113,086	90,246
Through Intermediary | MACI implants, kits, and instruments | Time-and-materials contract
Disaggregation of Revenue [Line Items]
Product sales, net	4,034	3,473	9,605	10,160
Time-and-materials contract | MACI implants, kits, and instruments | Time-and-materials contract
Disaggregation of Revenue [Line Items]
Product sales, net	1,056	1,083	3,624	3,227
Provider or Facility | MACI implants, kits, and instruments | Contract rate
Disaggregation of Revenue [Line Items]
Product sales, net	8,032	6,968	25,358	21,465
Provider or Facility | NexoBrid
Disaggregation of Revenue [Line Items]
NexoBrid	1,466	1,065	3,971	2,269
Directly to consumer | Biopsy kits
Disaggregation of Revenue [Line Items]
Product sales, net	652	469	1,890	1,530
Directly to consumer | Epicel
Disaggregation of Revenue [Line Items]
Product sales, net	$ 10,375	$ 12,184	$ 23,954	$ 30,606