Acquisitions - Assets acquired and liabilities assumed (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Apr. 18, 2023	Dec. 23, 2022
Business Acquisition [Line Items]
Goodwill	$ 53,868	$ 53,868
NextSphere
Business Acquisition [Line Items]
Current assets			$ 9,708
Property, plant and equipment			192
Intangible assets	9,906		9,906
Goodwill			9,031
Other noncurrent assets			511
Total assets acquired			29,348
Accounts payable, accrued expenses and other liabilities			(1,990)
Deferred taxes			(2,427)
Total liabilities assumed			(4,417)
Purchase price allocation			24,931
Cash and cash equivalents			$ 6,400
Mutual Mobile
Business Acquisition [Line Items]
Current assets				$ 4,982
Property, plant and equipment				132
Intangible assets	$ 3,749			3,749
Goodwill				8,879
Other noncurrent assets				102
Total assets acquired				17,844
Accounts payable, accrued expenses and other liabilities				(1,576)
Deferred taxes				(686)
Total liabilities assumed				(2,262)
Purchase price allocation				15,582
Cash and cash equivalents				$ 3,500