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Segment, Geographic information and revenue disaggregation (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2022
USD ($)
segment
Dec. 31, 2021
USD ($)
Segment Reporting Information [Line Items]    
Total revenues $ 22,469 $ 13,036
Number of segments | segment 1  
U.S.    
Segment Reporting Information [Line Items]    
Total revenues $ 18,021 9,147
Germany    
Segment Reporting Information [Line Items]    
Total revenues 3,477 3,250
Other countries    
Segment Reporting Information [Line Items]    
Total revenues $ 971 $ 639