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Note 3 - Fair Value of Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2015
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
(in thousands)
 
December 31,
 
Hedge derivative
liability
 
 
2015
(1)
 
 
2014
(1)
Fair Value of Derivative
  $ (28,434 )   $ (22,720 )
Quoted Prices in Active Markets (Level 1)
    -       -  
Significant Other Observable Inputs (Level 2)
  $ (28,434 )   $ (22,720 )
Significant Unobservable Inputs (Level 3)
    -       -