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Note 13 - Earnings / (Loss) Per Share (Tables)
 12 Months Ended
Dec. 31, 2012
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
2010
   
2011
   
2012
 
Income:
                 
Net income/(loss)
    (6,605,850 )     1,115,989       (13,198,741 )
Basic earnings per share:
                       
Weighted average common shares –
    Outstanding
    31,636,633       31,794,381       38,950,100  
Basic earnings/(loss) per share
    (0.21 )     0.04       (0.34 )
Effect of dilutive securities
                       
Non-vested incentive stock awards
    -       51,699       -  
Weighted average common shares –
    Outstanding
    31,636,633       31,846,080       38,950,100  
Diluted earnings /(loss) per share
    (0.21 )     0.04       (0.34 )