Quarterly report pursuant to sections 13 or 15(d)

DERIVATIVE INSTRUMENTS (Details)

v2.4.0.8
DERIVATIVE INSTRUMENTS (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
DERIVATIVE INSTRUMENTS [Abstract]          
Feedstock and natural gas usage to operating expenses (in hundredths)     79.90% 82.10%  
Monthly feedstock requirements hedged, Maximum (in hundredths) 40.00%   40.00%    
Derivatives, Fair Value [Line Items]          
Unrealized gain (loss)     $ (39,000) $ (731,000) [1]  
Fair value of financial contracts - asset (liability) (39,000)   (39,000)   0
Realized and unrealized gains (losses) as a percentage of cost of sales and processing (in hundredths) 0.00% 0.00% 0.00% 1.20%  
Net cumulative loss     174,000 103,000 [1]  
Interest Rate Swaps [Member]
          
Derivatives, Fair Value [Line Items]          
Term loan in pay fixed, receive variable interest rate swap 10,000,000   10,000,000    
Term loan secured by plant, pipeline and equipment 14,000,000   14,000,000    
Notional amount 4,500,000   4,500,000    
Derivative, variable interest rate (in hundredths) 5.83%   5.83%    
Cumulative loss     (625,000) (978,000)  
Deferred tax benefit     219,000 333,000  
Net cumulative loss     (406,000) (645,000)  
Interest expense reclassified from other comprehensive loss     231,000 275,000  
Fair value of interest rate swap - liability 625,000   625,000   893,000
Cash flow hedge gain (loss) to be reclassified within twelve months     257,000    
Not Designated as Hedging Instrument [Member] | Commodity Financial Instruments [Member]
          
Derivatives, Fair Value [Line Items]          
Unrealized gain (loss) (39,000) 1,446,000 (39,000) (837,000)  
Realized loss 0 (1,446,000) 0 (942,000)  
Net loss $ (39,000) $ 0 $ (39,000) $ (1,779,000)  
[1] (restated)