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Segment, Geographic information and revenue disaggregation (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2023
USD ($)
segment
Dec. 31, 2022
USD ($)
Segment Reporting Information [Line Items]    
Total revenues $ 39,295 $ 22,469
Number of segments | segment 1  
U.S.    
Segment Reporting Information [Line Items]    
Total revenues $ 35,111 18,021
Germany    
Segment Reporting Information [Line Items]    
Total revenues 3,690 3,477
Other countries    
Segment Reporting Information [Line Items]    
Total revenues $ 494 $ 971