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Deferred Revenue (Tables)
12 Months Ended
Dec. 31, 2017
Deferred Revenue [Abstract]  
Schedule of deferred revenues by segment
  Years ended December 31, 
  2017  2016 
Deferred license fees $1,089  $1,812 
Deferred AirBar revenues  137   109 
Deferred sensor modules revenues  22   - 
  $1,248  $1,921