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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Summary of Value Added Tax Receivables) (Details) - USD ($)
$ in Thousands
May 31, 2017
Aug. 31, 2016
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]    
Value Added Tax, Prepaid expenses and other current assets $ 1,426 $ 1,635
Value Added Tax, Other non-current assets 29,041 32,502
Total amount of VAT receivables reported $ 30,467 $ 34,137