Segment, Geographic information and revenue disaggregation (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) segment	Dec. 31, 2023 USD ($)
Segment Reporting Information [Line Items]
Total revenues	$ 51,292	$ 39,295
Number of segments | segment	1
U.S.
Segment Reporting Information [Line Items]
Total revenues	$ 47,167	35,111
Germany
Segment Reporting Information [Line Items]
Total revenues	3,460	3,690
Other countries
Segment Reporting Information [Line Items]
Total revenues	$ 665	$ 494