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FAIR VALUE MEASUREMENTS (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Dec. 31, 2012
FAIR VALUE MEASUREMENTS    
Maximum period of interest rate paid on floating-rate debt 3 months  
Transfer of assets from level 1 to level 2 $ 0  
Transfer of assets from level 2 to level 1 0  
Transfer of liabilities from level 1 to level 2 0  
Transfer of liabilities from level 2 to level 1 0  
Transfer of assets from level 3 to other levels 0  
Transfer of assets from other levels to level 3 0  
Transfer of liabilities from level 3 to other levels 0  
Transfer of liabilities from other levels to level 3 0  
Fair value measurements related to derivative instruments    
Commodity price contracts (assets) 77,014 2,000,000
Commodity price contracts
   
Fair value measurements related to derivative instruments    
Commodity price contracts (assets) 234,413 1,960,005
Total Carrying Value | Commodity price contracts | Recurring basis
   
Fair value measurements related to derivative instruments    
Commodity price contracts (assets) 234,413  
Commodity price contracts (liabilities) (157,399)  
Total 77,014 1,960,005
Level 2 | Commodity price contracts | Recurring basis
   
Fair value measurements related to derivative instruments    
Commodity price contracts (assets) 234,413  
Commodity price contracts (liabilities) (157,399)  
Total $ 77,014 $ 1,960,005