Segment and geographic information - Schedule of long-lived assets, net of accumulated depreciation and amortization (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	$ 11,358	$ 8,215
Serbia
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	2,457	1,235
Ukraine
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	2,437	2,468
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	2,174	1,317
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	$ 4,290	$ 3,195