Organization and significant accounting policies - Schedule of Revenues by Product Line (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Total revenue	$ 82,254	$ 75,855	$ 76,239
Product, Cell Processing
Disaggregation of Revenue [Line Items]
Total revenue	73,446	65,772	68,509
Product, Evo and thaw
Disaggregation of Revenue [Line Items]
Total revenue	2,582	3,196	3,434
Service, Evo and thaw
Disaggregation of Revenue [Line Items]
Total revenue	160	349	73
Rental, Evo and thaw
Disaggregation of Revenue [Line Items]
Total revenue	$ 6,066	$ 6,538	$ 4,223