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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Summary of Foreign Currency Gains and Losses) (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2017
Aug. 31, 2016
Aug. 31, 2015
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]      
Currency gain (loss) $ 1,241 $ (899) $ (4,388)