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Note 6 - Business Acquisitions (Tables)
 3 Months Ended
Mar. 31, 2019
Notes Tables  
Business Acquisition, Pro Forma Information [Table Text Block]
   
For the Three Months Ended
  
   
March 31,
 
   
2019
    
2018
  
                 
Revenue
   $
9,110,725
     $
8,014,327
  
                 
Net Loss Attributable to Common Stockholders
   $
(4,078,386
 )   $
(3,265,232
 )
                 
Basic and Diluted Loss per Share
   $
(0.18
 )   $
(0.21
 )
                 
Basic and Diluted Weighted Average Class A and Class B Common Shares Outstanding
    
22,186,219
      
15,484,795