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Equity (Tables)
6 Months Ended
Jun. 30, 2018
Equity [Abstract]  
Schedule of employee option activity under the 2007 Plan

    

Number
of options

   Weighted
average
exercise
price
   Weighted
average
remaining
contractual
term
(in years)
   Aggregate
intrinsic
value
 
                   
  Outstanding at January 1, 2018   309,309   $4.38    3.97   $1,237 
  Granted   -   $-           
  Exercised   (625)  $4.00           
  Forfeited   (21,875)  $6.89           
                       
  Outstanding at June 30, 2018   286,809   $4.19    3.25   $1,179 
                       
  Exercisable at June 30, 2018   280,559   $4.15    3.21   $1,165