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Intangible Assets (Schedule of net intangible assets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]      
Original cost $ 2,052 $ 1,034  
Accumulated amortization 334 68  
Intangible assets, Net 1,718 966  
Amortization expense 266 1,103 $ 1,888
Capitalization of software development costs [Member]      
Finite-Lived Intangible Assets [Line Items]      
Original cost 1,946 928  
Accumulated amortization 274 37  
Intangible assets, Net $ 1,672 891  
Useful life 3 years    
Licenses [Member]      
Finite-Lived Intangible Assets [Line Items]      
Original cost $ 106 106  
Accumulated amortization 60 31  
Intangible assets, Net $ 46 $ 75  
Useful life 3 years