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Note 14 - Stock Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2019
Notes Tables  
Nonvested Restricted Stock Shares Activity [Table Text Block]
   
Number of
Shares
    
Weighted-Average Grant Date Fair Value per Share
    
Weighted-Average Remaining Contractual Term (Years)
  
Non-vested at January 1, 2018
    
3,962,500
     $
0.62
      
2.92
  
Granted
    
145,000
      
0.62
      
-
  
Vested
    
(1,157,500
 )    
0.62
      
-
  
Forfeited
    
-
      
-
      
-
  
Non-vested at September 30, 2018
    
2,950,000
     $
0.62
      
2.25
  
                         
Non-vested at December 31, 2018
    
2,612,500
     $
0.62
      
2.00
  
Granted
    
1,250,000
      
1.01
      
-
  
Vested
    
(1,462,500
 )    
0.69
      
-
  
Forfeited
    
-
      
-
      
-
  
Non-vested at September 30, 2019
    
2,400,000
     $
0.75
      
1.75