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FINANCING ARRANGEMENTS (Details) (USD $)
6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2012
Line of credit
Jun. 30, 2012
Line of credit
May 02, 2012
Line of credit
Jun. 30, 2012
Real estate term loan
Jun. 30, 2012
Real estate term loan
Jun. 30, 2012
Real estate term note maturing on March 31, 2027
May 02, 2012
Real estate term note expiring on May 31, 2012
Jun. 30, 2012
Term loan
Maximum
Financing arrangements                    
Variable rate basis LIBOR     LIBOR     LIBOR      
Maximum borrowing capacity         $ 13,500,000          
Debt instrument, face amount               1,800,000 900,000 2,000,000
Weighted-average interest rate (as a percent)     3.70% 3.80%   3.60% 3.90%      
Outstanding balance 8,268,737 9,345,044 8,300,000 8,300,000            
Unused availability supported by entity's borrowing base     $ 4,300,000 $ 4,300,000