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Note 10 - (Loss) Earnings Per Common Share (Tables)
 6 Months Ended
Jun. 30, 2017
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
    Six months ended June 30,
    2016   2017
Income:    
Net income/(loss)  
290
    
(5,838
 )
             
Earnings per share:            
Weighted average common shares outstanding, basic and diluted  
3,426,780
    
337,138
  
             
 Earnings/(Loss) per share, basic and diluted  
0.08
    
(17.32
 )