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Segment, customer, and geographic information - Schedule of Product Revenue Concentration (Details)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
CryoStor | Revenue | Product Concentration Risk      
Segment Reporting Information [Line Items]      
Concentration risk, percentage 82.00% 80.00% 82.00%