Quarterly report pursuant to sections 13 or 15(d)

DERIVATIVE INSTRUMENTS (Details)

v2.4.0.8
DERIVATIVE INSTRUMENTS (Details) (USD $)
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
DERIVATIVE INSTRUMENTS [Abstract]      
Feedstock and natural gas usage to operating expenses (in hundredths) 81.50% 80.50%  
Monthly feedstock requirements hedged, Maximum (in hundredths) 40.00%    
Derivatives, Fair Value [Line Items]      
Unrealized gain (loss) $ 48,000 $ 0  
Fair value of derivative liability 0   48,000
Realized and unrealized gains (losses) as a percentage of cost of sales and processing (in hundredths) 0.00% 0.00%  
Net cumulative loss 44,000 55,000  
Interest Rate Swaps [Member]
      
Derivatives, Fair Value [Line Items]      
Term loan in pay fixed, receive variable interest rate swap 10,000,000    
Term loan secured by plant, pipeline and equipment 14,000,000    
Notional amount 4,000,000    
Derivative, variable interest rate (in hundredths) 5.83%    
Cumulative loss (495,000) (808,000)  
Deferred tax benefit 173,000 283,000  
Net cumulative loss (322,000) (525,000)  
Interest expense reclassified from other comprehensive loss 67,000 78,000  
Fair value of interest rate swap - liability 495,000   563,000
Cash flow hedge gain (loss) to be reclassified within twelve months 229,000    
Not Designated as Hedging Instrument [Member] | Commodity Financial Instruments [Member]
      
Derivatives, Fair Value [Line Items]      
Unrealized gain (loss) (48,000) 0  
Realized gain 87,000 0  
Net gain $ 39,000 $ 0