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Geographic Information (Tables)
12 Months Ended
Dec. 31, 2019
Geographic Area Disclosure [Abstract]  
Long-lived Assets by Geographic Areas [Table Text Block]
   December 31, 
   2019   2018 
         
U.S  $1,782   $1,839 
Israel   15,253    12,581 
EMEA   258    328 
Asia Pacific   196    246 
           
   $17,489   $14,994 

 

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
  

Year ended December 31,

 
   2019   2018   2017 
             
Customer A   0%   15%   18%
Customer B   12%   17%   13%