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OPERATING LEASE (Schedule of Operating Leases) (Details) - USD ($)	9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Operating lease right-of-use asset
Operating lease right-of-use assets	$ 297,533	$ 82,743	$ 0	$ 0
Operating lease right-of-use assets, current	0		55,162
Addition	323,036
Amortization	(80,665)	(82,743)
Operating lease liabilities
Operating lease liabilities	317,990	87,283	$ 59,094	$ 0
Addition	323,036
Accretion	5,497	10,893
Lease payments	$ (69,637)	(89,096)
ASU 2016-02 [Member]
Operating lease right-of-use asset
Operating lease right-of-use assets		165,486
Operating lease liabilities
Operating lease liabilities		$ 165,486

X

- Definition

The amount of accretion expense on operating lease liabilities.

+ References

No definition available.

+ Details

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X

- Definition

Operating lease liabilities addition.

+ References

No definition available.

+ Details

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Namespace Prefix:	epix_
Data Type:	xbrli:monetaryItemType
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- References

No definition available.

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- Definition

Operating lease right of use asset addition.

+ References

No definition available.

+ Details

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Namespace Prefix:	epix_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of lessee's right to use underlying asset under operating lease, current

+ References

No definition available.

+ Details

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Namespace Prefix:	epix_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977

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Balance Type:	credit
Period Type:	instant

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- References

No definition available.

+ Details

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

X

- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918643-209977

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (g)(1)
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980

+ Details

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Balance Type:	credit
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X

- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977

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Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of amortization expense for right-of-use asset from operating lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

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