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Fixed Assets, Net (Tables)
12 Months Ended
Dec. 31, 2016
Property, Plant and Equipment [Abstract]  
Summary of Fixed Assets, Net

    As of December 31,  
    2016     2015  
    (in thousands)  
             
Cost:                
Research equipment and software   $ 54     $ 29  
Furniture and office equipment     63       63  
      117       92  
Accumulated Depreciation:                
Research equipment and software     22       18  
Furniture and office equipment     42       36  
      64       54  
    $ 53     $ 38