Number of additional shares issued under share-based payment arrangement.

No definition available.

Name:	enrt_AdditionalCommonSharesIssuedInEscrow
Namespace Prefix:	enrt_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Net number of share options (or share units) granted during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Value of shares of stock issued during the period as part of a transaction to acquire assets that do not qualify as a business combination.

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodValuePurchaseOfAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=enrt_DefinitiveAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=enrt_RodneyBBlakeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=enrt_ConsultingContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=enrt_AlbertClarkRichMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=enrt_MarkSnyderMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=srt_ChiefExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SUBSEQUENT EVENTS (Narrative) (Details) - USD ($)			3 Months Ended	12 Months Ended
SUBSEQUENT EVENTS (Narrative) (Details) - USD ($)	Dec. 14, 2020	Nov. 12, 2020	Nov. 30, 2020	Aug. 31, 2020
Subsequent Event [Line Items]
Number of stock options issued		500,000	500,000	2,000,000
Exercise prices		$ 0.05	$ 0.05	$ 0.02
Subsequent Event [Member] \| Definitive agreement [Member]
Subsequent Event [Line Items]
Number of stock options issuance	$ 1,000,000
Number of additional common shares issued in escrow	1,000,000
Subsequent Event [Member] \| Rodney B Blake [Member] \| Consulting contract [Member]
Subsequent Event [Line Items]
Number of stock options issued	100,000
Term of stock options issuance	5 years
Exercise prices	$ 0.05
Subsequent Event [Member] \| Albert Clark Rich [Member] \| Consulting contract [Member]
Subsequent Event [Line Items]
Number of stock options issued	500,000
Term of stock options issuance	5 years
Exercise prices	$ 0.05
Subsequent Event [Member] \| Mark Snyder [Member] \| Consulting contract [Member]
Subsequent Event [Line Items]
Number of stock options issued	1,000,000
Term of stock options issuance	5 years
Exercise prices	$ 0.05
Subsequent Event [Member] \| Robert McAllister CEO [Member]
Subsequent Event [Line Items]
Number of stock options issued	500,000
Term of stock options issuance	5 years
Exercise prices	$ 0.05