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Note 11 - Equity-Method Investment (Tables)
3 Months Ended
Mar. 31, 2015
Consolidated Balance Sheets [Member]  
Note 11 - Equity-Method Investment (Tables) [Line Items]  
Equity Method Investments [Table Text Block]
   

March 31,

2015

   

December 31,

2014

 

Carrying value, recorded as a component of other non-current assets

  $ 39,871     $ 33,282  

Present value of obligation associated with future equity contributions, recorded as a component of accrued liabilities and other long-term liabilities

    39,076       32,177  
Consolidated Statements of Operations [Member]  
Note 11 - Equity-Method Investment (Tables) [Line Items]  
Equity Method Investments [Table Text Block]
   

Three Months Ended

March 31,

 
   

2015

   

2014

 

Asset impairments to write investment down to fair value

  $ 4,130     $ -  

Our portion of the partnership’s operating losses

    1,732       -  

Non-cash interest expense related to the amortization of the discounted fair value of future equity contributions

    211       -  

Tax benefits and credits generated

    7,250       -