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Fair Value Measurements (Narrative) (Details) (USD $)
May 31, 2013
Aug. 31, 2012
May 31, 2012
Fair Value Measurements [Abstract]      
Carrying amount of long-term debt (including current portion) $ 1,071,000 $ 4,285,000 $ 5,357,000
Fair value of the long-term portion $ 1,100,000 $ 4,300,000 $ 5,300,000