Organization and significant accounting policies - Summary of Product Revenue Concentration (Details) - Revenue	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Product revenue concentration | CryoStor
Concentration Risk [Line Items]
Concentration risk, percent	41.00%	32.00%	42.00%	33.00%
Product revenue concentration | 780XLE Freezer
Concentration Risk [Line Items]
Concentration risk, percent	20.00%	25.00%	17.00%	23.00%
Revenue by customers’ geographic locations
Concentration Risk [Line Items]
Concentration risk, percent	100.00%	100.00%	100.00%	100.00%
Revenue by customers’ geographic locations | United States
Concentration Risk [Line Items]
Concentration risk, percent	83.00%	75.00%	81.00%	77.00%
Revenue by customers’ geographic locations | Europe, Middle East, Africa (EMEA)
Concentration Risk [Line Items]
Concentration risk, percent	13.00%	17.00%	16.00%	17.00%
Revenue by customers’ geographic locations | Canada
Concentration Risk [Line Items]
Concentration risk, percent	0.00%	5.00%	0.00%	3.00%
Revenue by customers’ geographic locations | Other
Concentration Risk [Line Items]
Concentration risk, percent	4.00%	3.00%	3.00%	3.00%