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Note 9 - Financial Instruments (Tables)
6 Months Ended
Jun. 30, 2014
Disclosure Text Block Supplement [Abstract]  
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]
   
Fair Value Measurement at Reporting Date Using
 
   
Total,
December 31,
2013
   
Quoted Prices in
Active Markets for
Identical
Assets (Level 1)
   
Significant Other
Observable Inputs
(Level 2)
   
Significant Other
Unobservable
Inputs (Level 3)
 
 
Liabilities
                       
Derivatives, current and long-term portion
  $ 1,017,748       -     $ 1,017,748       -  
   
Fair Value Measurement at Reporting Date Using
 
   
Total,
June 30, 2014
   
Quoted Prices in
Active Markets for
Identical
Assets (Level 1)
   
Significant Other
Observable Inputs
(Level 2)
   
Significant Other
Unobservable
Inputs (Level 3)
 
Liabilities
                       
Derivatives, current and long-term portion
  $ 675,846       -     $ 675,846       -  
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
Derivatives not designated as hedging instruments
 
 
Balance Sheet Location
 
December 31,
2013
   
June 30,
2014
 
Interest rate contracts
Current liabilities - Derivatives
    697,889       501,015  
Interest rate contracts
Long-term liabilities - Derivatives
    319,859       174,831  
Total derivative liabilities
      1,017,748       675,846  
Derivative Instruments, Gain (Loss) [Table Text Block]
Derivatives not designated as hedging instruments
 
Location of gain (loss) recognized
 
Six Months
Ended June 30,
2013
   
Six Months
Ended June 30,
2014
 
Interest rate – Fair value
Change in fair value of derivatives
    882,937       341,902  
Interest rate contracts  - Realized loss
Change in fair value of derivatives
    (884,964 )     (437,767 )
Total loss on derivatives
      (2,027 )     (95,865 )