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TRADE ACCOUNTS RECEIVABLE (Details) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Trade accounts receivable [Abstract]    
Trade accounts receivable $ 2,906,000 $ 2,236,000
Less: allowance for doubtful accounts (32,000) (20,000)
Trade accounts receivable, net $ 2,874,000 $ 2,216,000