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Note 10 - Earnings Per Common Share (Tables)
 3 Months Ended
Mar. 31, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
March 31,
  
                 
   
2019
    
2018
  
                 
Earnings Per Share - Basic
  
 
 
 
  
 
 
 
Net Income
   $
1,745,458
     $
373,752
  
Weighted average shares of common stock outstanding - Basic
    
2,755,265
      
2,911,057
  
Earnings Per Share - Basic
   $
0.63
     $
0.13
  
                 
Earnings Per Share - Diluted
  
 
 
 
  
 
 
 
Weighted average shares of common stock outstanding - Basic
    
2,755,265
      
2,911,057
  
Warrants, Options and Convertible Notes
    
423,155
      
358,796
  
Weighted average shares of common stock -Diluted
    
3,178,420
      
3,269,853
  
Earnings Per Share - Diluted
   $
0.55
     $
0.11