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Note 5 - Fair Value of Financial Instruments (Tables)
3 Months Ended
Mar. 31, 2016
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
(in thousands)
               
Hedge derivative liability
 
March 31,
2016
   
December 31,
2015
 
Fair Value of Derivatives
  $ (26,280 )   $ (28,434 )
Quoted Prices in Active Markets (Level 1)
    -       -  
Significant Other Observable Inputs (Level 2)
  $ (26,280 )   $ (28,434 )
Significant Unobservable Inputs (Level 3)
    -       -