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Note 14 - Stock Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2018
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 December 31, 2017
    
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