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Note 5 - Fair Value of Financial Instruments (Tables)
9 Months Ended
Sep. 30, 2016
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
(in thousands)
               
Hedge derivative liability
 
September 30, 2016
   
December 31, 2015
 
Fair Value of Derivatives
  $ (12,957 )   $ (28,434 )
Quoted Prices in Active Markets (Level 1)
    -       -  
Significant Other Observable Inputs (Level 2)
  $ (12,957 )   $ (28,434 )
Significant Unobservable Inputs (Level 3)
    -       -