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Note 9 - Loss Per Share (Tables)
 6 Months Ended
Jun. 30, 2017
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
    For the six months
ended June 30,
      2016       2017  
         
Net loss attributable to common shareholders’    
(22,879,140
 )    
(4,111,296
 )
                 
Weighted average common shares – Outstanding    
8,104,860
      
11,030,754
  
                 
Basic and diluted  loss per share    
(2.82
 )    
(0.37
 )