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Debt (Tables)
12 Months Ended
Dec. 31, 2015
Debt Disclosure [Abstract]  
Components of Debt
The components of our debt at December 31, 2014 are presented in the table below (in thousands):
  
 
December 31,
 
2014
 
 
Unsecured promissory note - Quercus Trust
$
70

Long-term debt
$
70