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Note 5 - Share Based Compensation
6 Months Ended
Jun. 30, 2019
Notes to Financial Statements  
Share-based Payment Arrangement [Text Block]
5.
SHARE BASED COMPENSATION
 
The following table presents share-based compensation expenses included in the Company’s unaudited condensed interim consolidated statements of operations:
 
   
Three Months Ended June 30,
 
   
201
9
   
201
8
 
                 
Selling, general and administrative
  $
115,526
    $
128,620
 
Research, development and engineering
   
15,528
     
20,922
 
    $
131,054
    $
149,542
 
   
   
Six Months Ended June 30,
 
   
201
9
   
201
8
 
                 
Selling, general and administrative
  $
568,613
    $
599,766
 
Research, development and engineering
   
88,475
     
99,709
 
    $
657,088
    $
699,475