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Note 6 - Business Acquisitions (Tables)
 6 Months Ended
Jun. 30, 2019
Notes Tables  
Business Acquisition, Pro Forma Information [Table Text Block]
   
For the Three Months Ended
    
For the Six Months Ended
  
   
June 30,
    
June 30,
  
   
2019
    
2018
    
2019
    
2018
  
                                 
Revenue
   $
10,139,561
     $
8,181,142
     $
19,250,286
     $
16,195,469
  
                                 
Net Loss Attributable to Common Stockholders
   $
(2,114,348
 )   $
(2,793,947
 )   $
(6,192,734
 )   $
(6,059,179
 )
                                 
Basic and Diluted Loss per Share
   $
(0.09
 )   $
(0.15
 )   $
(0.28
 )   $
(0.34
 )
                                 
Basic and Diluted Weighted Average Class A and Class B Common Shares Outstanding
    
22,452,540
      
19,250,323
      
22,320,114
      
17,865,624