Summary of significant accounting policies - Service and Other Revenue and Disaggregation of Revenue (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended		6 Months Ended
	Dec. 04, 2023	Jun. 30, 2022	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Standard service-based warranty terms					1 year
Extended service-based warranty terms					1 year
Revenue			$ 23,164	$ 23,521	$ 41,514	$ 44,931
Contract assets			2,248		$ 2,248		$ 1,276
Practical expedient elected					true
Acrivon Agreement
Disaggregation of Revenue [Line Items]
Potential aggregate upfront payments	$ 17,250	$ 17,850
Product
Disaggregation of Revenue [Line Items]
Revenue			15,926	17,147	$ 28,066	32,671
Instruments
Disaggregation of Revenue [Line Items]
Revenue			8,295	11,276	13,164	20,883
Consumables
Disaggregation of Revenue [Line Items]
Revenue			7,390	5,819	14,391	11,531
Standalone software products
Disaggregation of Revenue [Line Items]
Revenue			241	52	511	257
Service and other
Disaggregation of Revenue [Line Items]
Revenue			7,238	6,374	13,448	12,260
Service and other revenue
Disaggregation of Revenue [Line Items]
Revenue			4,459	3,869	7,842	7,421
Instrument warranty
Disaggregation of Revenue [Line Items]
Revenue			$ 2,779	$ 2,505	$ 5,606	$ 4,839