Organization and significant accounting policies - Schedule of Product Revenue Concentration (Details) - Revenue	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Product revenue concentration | CryoStor
Concentration Risk [Line Items]
Concentration risk, percent	41.00%	44.00%
Product revenue concentration | 780XLE Freezer
Concentration Risk [Line Items]
Concentration risk, percent	13.00%	14.00%
Revenue by customers' geographic locations
Concentration Risk [Line Items]
Concentration risk, percent	100.00%	100.00%
Revenue by customers' geographic locations | United States
Concentration Risk [Line Items]
Concentration risk, percent	80.00%	79.00%
Revenue by customers' geographic locations | Europe, Middle East, Africa (EMEA)
Concentration Risk [Line Items]
Concentration risk, percent	15.00%	18.00%
Revenue by customers' geographic locations | Other
Concentration Risk [Line Items]
Concentration risk, percent	5.00%	3.00%