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Property and Equipment, Net (Tables)
12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Abstract]  
Schedule of components of Property and Equipment, Net
    December 31,  
    2018     2017  
Cost:            
Computer equipment   $ 712     $ 709  
Office furniture and equipment     293       293  
Machinery and laboratory equipment     593       583  
Field service units     1,246       1,010  
Leasehold improvements     333       333  
                 
    $ 3,177     $ 2,928  

 

    December 31,  
    2018     2017  
Accumulated depreciation     2,551       2,088  
                 
Property and equipment, net   $ 626     $ 840