Segment and geographic information - Schedule of long-lived assets by physical location (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 12,552	$ 11,358
Serbia
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	2,575	2,457
Ukraine
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	2,496	2,437
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	2,498	2,174
Poland
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	1,875	1,522
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 3,108	$ 2,768