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INCOME TAXES (Narrative) (Details) (USD $)	12 Months Ended
INCOME TAXES (Narrative) (Details) (USD $)	Aug. 31, 2013
Income Taxes 1	$ 5,528,102

X

- Definition

Income Taxes 1

+ References

No definition available.

+ Details

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Namespace Prefix:	enrt_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration