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MINERAL PROPERTY (Narrative) (Details)	9 Months Ended
MINERAL PROPERTY (Narrative) (Details)	May 31, 2019
Percentage of Land Rights Interest	100.00%

X

- Definition

Percentage of Land Rights Interest

+ References

No definition available.

+ Details

Name:	enrt_PercentageOfLandRightsInterest
Namespace Prefix:	enrt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration