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Note 7 - Income Per Share (Tables)
9 Months Ended
Sep. 30, 2015
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Three months ended September 30, 2015          

Weighted
Average

         
   

Net Income

   

Common Shares
Outstanding (1)

   

Amount (1)

 
                         

Basic Earnings Per Share

  $ 633,000       3,872,298     $ 0.16  
                         

Effect of Dilutive Securities

                       

Non-vested Restricted Stock Grants

 

N/A

      34,622    

N/A

 
                         

Diluted Earnings Per Share

  $ 633,000       3,906,920     $ 0.16  
Three months ended September 30, 2014           Weighted Average           
   

Net Income

   

Common Shares 
Outstanding (1)

   

Amount (1)

 
                         

Basic Earnings Per Share

  $ 17,261,000       3,850,206     $ 4.48  
                         

Effect of Dilutive Securities

                       

Non-vested Restricted Stock Grants

 

N/A

      28,012    

N/A

 
                         

Diluted Earnings Per Share

  $ 17,261,000       3,878,218     $ 4.45  
Nine months ended September 30, 2015          

Weighted
Average

         
   

Net Income

    Common Shares 
Outstanding (1)
   

Amount (1)

 
                         

Basic Earnings Per Share

  $ 1,611,000       3,872,074     $ 0.42  

Effect of Dilutive Securities

                       

Non-vested Restricted Stock Grants

 

N/A

      30,699    

N/A

 
                         

Diluted Earnings Per Share

  $ 1,611,000       3,902,773     $ 0.41  
Nine months ended September 30, 2014                        
            Weighted Average           
   

Net Income

   

Common Shares 

Outstanding (1)

   

Amount (1)

 
                         

Basic Earnings Per Share

  $ 18,105,000       3,849,762     $ 4.70  

Effect of Dilutive Securities

                       

Non-vested Restricted Stock Grants

 

N/A

      32,647    

N/A

 
                         

Diluted Earnings Per Share

  $ 18,105,000       3,882,409     $ 4.66