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Note 7 - Stock Incentive Plans and Share-based Compensation (Tables)
 9 Months Ended
Sep. 30, 2019
Notes Tables  
Share-based Payment Arrangement, Option, Activity [Table Text Block]
Options
  
Shares
    
Weighted
Average
Exercise
Price per
Share
    
Weighted
Average
Remaining
Contractual
Term
(years)
    
Aggregate
Intrinsic
Value
  
Outstanding at December 31, 2018
    
178,000
     $
7.19
      
8.63
      
—
  
Granted
    
—
      
—
      
—
      
—
  
Exercised
    
—
      
—
      
—
      
—
  
Forfeited, canceled or expired
    
(16,667
)
    
7.38
      
—
      
—
  
Outstanding at September 30, 2019
    
161,333
      
7.17
      
7.74
      
—
  
                                 
                                 
Exercisable at September 30, 2019
    
161,333
     $
7.17
      
7.74
     $
—