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FINANCIAL INSTRUMENTS AND RISK (Narrative) (Details) - Dec. 31, 2024 | CAD ($) | USD ($)
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FINANCIAL INSTRUMENTS AND RISK |  |
Cash, CDIC insured amount | $ 100,000 |
Cash, FDIC insured amount |  | $ 250,000
Working capital |  | $ 118,418,042

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- Definition The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Canada Deposit Insurance Corporation. + References No definition available. + Details
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Namespace Prefix: | epix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition na + References No definition available. + Details
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Namespace Prefix: | epix_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents amount of working capital. + References No definition available. + Details
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Namespace Prefix: | epix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant