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Note 12 - Equity-Method Investment (Tables)
9 Months Ended
Sep. 30, 2015
Consolidated Statement of Operations [Member]  
Notes Tables  
Equity Method Investments [Table Text Block]
 
 
Three Months Ended
September
30,
 
 
Nine
Months Ended
September
30,
 
 
 
2015
 
 
2014
 
 
2015
 
 
2014
 
Asset impairments to write investment down to fair value
  $ 4,131     $ -     $ 12,391     $ -  
Our portion of the partnership’s operating losses
    1,731       -       5,196       -  
Non-cash interest expense related to the amortization of the discounted fair value of future equity contributions
    155       -       549       -  
Tax benefits and credits generated
    7,414       -       22,316       -  
Consolidated Balance Sheet [Member]  
Notes Tables  
Equity Method Investments [Table Text Block]
 
 
September 30
,
201
5
 
 
December 31,
2014
 
Carrying value, recorded as a component of other non-current assets
  $ 28,147     $ 33,282  
Present value of obligation associated with future equity contributions, recorded as a component of accrued liabilities and other long-term liabilities
    28,061       32,177