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5. Debt (Tables)
9 Months Ended
Sep. 30, 2016
Debt Disclosure [Abstract]  
Schedule of Long Term Debt
   September 30, 2016   December 31, 2015 
Kinergy operating line of credit  $63,916   $61,003 
Plant term debt   155,070    162,622 
    218,986    223,625 
Less unamortized discount   (1,369)   (2,299)
Less unamortized debt financing costs   (364)   (462)
Less short-term portion   (153,701)   (17,003)
Long-term debt  $63,552   $203,861