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Note 10 - Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Share-based Payment Arrangement, Option, Activity [Table Text Block]
   
2019
   
2018
 
   
Options
   
Weighted
Avg.
Exercise
Price
   
Options
   
Weighted
Avg.
Exercise
Price
 
Outstanding beginning of the year
 
 
81,426
   
$
7.77
     
140,424
    $
7.85
 
Granted
 
 
-
     
 
     
-
     
 
 
Exercised
 
 
-
     
 
     
-
     
 
 
Expired and forfeited
 
 
-
     
 
     
(58,998
)    
7.96
 
Outstanding at end of year
 
 
81,426
   
$
7.77
     
81,426
    $
7.77
 
                                 
Exercisable at end of year
 
 
24,426
   
$
7.77
     
14,655
    $
7.77