Fair value - Reconciliation of Acquisition-Related Contingent Consideration Payable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Liabilities Reconciliation [Roll Forward]
Contingent consideration payable, beginning balance	$ 3,288	$ 6,933	$ 1,947
Contingent consideration payable, ending balance	0	$ 3,288	6,933
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Other income/(expenses), net
Liabilities transfers into level 3	0	$ 0	0
Liabilities transfers out of level 3	0	0	0
Daxx
Fair Value, Liabilities Reconciliation [Roll Forward]
Change in fair value of contingent consideration payable included in Other income/(expense)			(14)
Payment of contingent consideration		(1,933)
Tacit
Fair Value, Liabilities Reconciliation [Roll Forward]
Acquisition date fair value of contingent consideration payable			4,000
Change in fair value of contingent consideration payable included in Other income/(expense)			$ 1,000
Payment of contingent consideration		(5,000)
Mutual Mobile Inc.
Fair Value, Liabilities Reconciliation [Roll Forward]
Acquisition date fair value of contingent consideration payable		$ 3,288
Change in fair value of contingent consideration payable included in Other income/(expense)	(3,288)
NextSphere Technologies Inc
Fair Value, Liabilities Reconciliation [Roll Forward]
Acquisition date fair value of contingent consideration payable	932
Change in fair value of contingent consideration payable included in Other income/(expense)	$ (932)