Quarterly report pursuant to Section 13 or 15(d)

LIABILITIES AND LONG-TERM DEBT (Details)

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LIABILITIES AND LONG-TERM DEBT (Details) (USD $)
0 Months Ended 6 Months Ended 6 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Jul. 10, 2014
Domestic Bank [Member]
Revolving Loan [Member]
bbl
Jun. 30, 2014
Domestic Bank [Member]
Revolving Loan [Member]
Dec. 31, 2013
Domestic Bank [Member]
Revolving Loan [Member]
May 25, 2006
Domestic Bank [Member]
Revolving Loan [Member]
Jun. 30, 2014
Term loan [Member]
Dec. 31, 2013
Term loan [Member]
Nov. 30, 2008
Term loan [Member]
Sep. 30, 2007
Term loan [Member]
Debt Instrument [Line Items]                    
Face amount                 $ 14,000,000 $ 10,000,000
Maturity date             Oct. 31, 2018      
Short-term amount outstanding 1,400,000 1,400,000         1,400,000 1,400,000    
Long-term amount outstanding 8,139,000 11,839,000   3,500,000 6,500,000   4,700,000 5,400,000    
Interest rate on loan (in hundredths)             2.25% 2.25%    
Principal payments             350,000      
Derivative amount of hedged item                   10,000,000
Maximum borrowing capacity     25,000,000 18,000,000   12,000,000        
Expiration date       Jun. 30, 2018            
Credit agreement sub limit available to support hedging program       3,000,000            
Interest rate (in hundredths)       2.25% 2.25%          
Quarterly commitment fee on the unused portion of loan (in hundredths)       0.25%            
Available remaining borrowing capacity       $ 14,500,000            
Total Increase of supply (in barrels)     6,700              
Increase of supply per day (in barrels)     11,000              
Commercial style amortization period     15 years