Organization and significant accounting policies - Narrative (Details)	1 Months Ended	6 Months Ended	12 Months Ended
	Nov. 30, 2020 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) reportable_segment reporting_unit	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Short-Term Debt [Line Items]
Number of reportable segments | reportable_segment			1
Number of reportable units | reporting_unit			1
Contract with customer, liability, revenue recognized			$ 39,000
Inventory write-down				$ 3,400,000
Standard warranty, term			1 year
Unrecognized tax benefits			$ 1,155,000	954,000	$ 610,000
Sales and excise tax payable			4,300,000	4,400,000
Advertising expense			$ 900,000	$ 800,000	$ 400,000
Impairment intangible asset, statement of income or comprehensive income, extensible enumeration not disclosed, flag			false	false	false
Interest Expense
Short-Term Debt [Line Items]
Sales and excise tax payable			$ 400,000	$ 400,000	$ 0
Tax Attributes Carried Forward
Short-Term Debt [Line Items]
Unrecognized tax benefits			$ 1,200,000
Assets Held for Rent
Short-Term Debt [Line Items]
Property, plant and equipment, useful life			3 years
Impairment of intangible assets (excluding goodwill)			$ 0	0	0
Minimum
Short-Term Debt [Line Items]
Property, plant and equipment, useful life			3 years
Maximum
Short-Term Debt [Line Items]
Property, plant and equipment, useful life			10 years
iVexSol, Inc.
Short-Term Debt [Line Items]
Equity securities without readily determinable fair value, amount				4,100,000	$ 4,100,000
iVexSol, Inc. | Series A-1 and A-2, Preferred Stock
Short-Term Debt [Line Items]
Equity securities without readily determinable fair value, amount				4,100,000
Impairment charge		$ 4,100,000
iVexSol, Inc. | Series A-2 Preferred Stock
Short-Term Debt [Line Items]
Equity securities without readily determinable fair value, amount	$ 1,000,000.0
PanTHERA CryoSolutions, Inc. | Series E Preferred Stock
Short-Term Debt [Line Items]
Equity securities without readily determinable fair value, amount			$ 1,000,000.0	$ 1,000,000.0
PanTHERA CryoSolutions, Inc. | Preferred Stock, Class E
Short-Term Debt [Line Items]
Contingent milestone payment	2,000,000.0
Contingent milestone paid			1,900,000
Milestone payment, paid during the year			$ 900,000
PanTHERA CryoSolutions, Inc. | Preferred Stock, Class E | PanTHERA Cryosolutions Investment
Short-Term Debt [Line Items]
Equity securities without readily determinable fair value, amount	$ 1,000,000.0