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Segment, customer, and geographic information - Schedule of Product Revenue Concentration (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
CryoStor | Revenue | Product revenue concentration        
Concentration Risk [Line Items]        
Concentration risk, percent 74.00% 72.00% 74.00% 72.00%