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Note 11 - Loss Per Share (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Year ended December 31
  
   
2019
    
2018
  
Numerator:
                
Net loss
  
$
(444,357
)
   $
(1,903,341
 )
Denominator:
                
Denominator for basic loss per share – weighted average shares
  
 
1,746,000
      
1,845,000
  
                 
Dilutive effect of employee stock options and other warrants
  
 
-
      
-
  
                 
Denominator for diluted loss per share – adjusted weighted average shares
  
 
1,746,000
      
1,845,000
  
                 
Basic loss per share
  
$
(0.25
)
   $
(1.03
 )
Diluted loss per share
  
$
(0.25
)
   $
(1.03
 )