Segment, Geographic information and revenue disaggregation (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) segment	Jun. 30, 2023 USD ($)
Segment Reporting Information [Line Items]
Total revenues	$ 11,807	$ 9,500	$ 22,577	$ 17,479
Number of segments | segment			1
U.S.
Segment Reporting Information [Line Items]
Total revenues	10,673	8,297	$ 20,508	15,239
Germany
Segment Reporting Information [Line Items]
Total revenues	802	1,126	1,679	2,017
Other countries
Segment Reporting Information [Line Items]
Total revenues	$ 332	$ 77	$ 390	$ 223