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Note 5 - Loss Per Common Share (Tables)
9 Months Ended
Sep. 30, 2015
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   

Three Months Ended
September 30,

   

Nine Months Ended
September 30,

 
   

2015

   

2014

   

2015

   

2014

 

Numerator

                               

Net income (loss)

  $ (9,890

)

  $ 3,676     $ (24,005

)

  $ 919  

Preferred stock dividends

    (138

)

    (138

)

    (414

)

    (414

)

Net income (loss) applicable to common shares for basic and diluted earnings per share

  $ (10,028

)

  $ 3,538     $ (24,419

)

  $ 505  
                                 

Denominator

                               

Basic weighted average common shares

    377,508       359,472       372,555       348,801  

Dilutive warrants, stock options and restricted stock

          2,790             5,872  

Diluted weighted average common shares

    377,508       362,262       372,555       354,673  

Basic earnings (loss) per common share

                               

Net income (loss) applicable to common shares

  $ (0.03

)

  $ 0.01     $ (0.07

)

  $  

Diluted earnings (loss) per common share

                               

Net income (loss) applicable to common shares

  $ (0.03

)

  $ 0.01     $ (0.07

)

  $