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ROYALTY AND OTHER PROPERTY INTERESTS - Disclosure for detailed information of payments in assets purchase agreement (Details) - Agnicos Oijarvi Gold Project [Member] $ in Thousands | Dec. 31, 2021 USD ($)
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Disclosure of detailed information about business combination [line items] |
Amount of shares issued | $ 1,500
Paid and issued upon signing of agreement [Member] |
Disclosure of detailed information about business combination [line items] |
Amount of shares issued | 375
Paid and issued on first anniversary of purchase agreement [Member] |
Disclosure of detailed information about business combination [line items] |
Amount of shares issued | 500
Paid and issued on second anniversary of purchase agreement [Member] |
Disclosure of detailed information about business combination [line items] |
Amount of shares issued | 625
Paid and issued on third anniversary of purchase agreement [Member] |
Disclosure of detailed information about business combination [line items] |
Amount of shares issued | 0
Gold Line Resources Ltd [Member] |
Disclosure of detailed information about business combination [line items] |
Cash Payments | 7,000
Amount of shares issued | 1,500
Gold Line Resources Ltd [Member] | Paid and issued upon signing of agreement [Member] |
Disclosure of detailed information about business combination [line items] |
Cash Payments | 750
Amount of shares issued | 375
Gold Line Resources Ltd [Member] | Paid and issued on first anniversary of purchase agreement [Member] |
Disclosure of detailed information about business combination [line items] |
Cash Payments | 1,500
Amount of shares issued | 500
Gold Line Resources Ltd [Member] | Paid and issued on second anniversary of purchase agreement [Member] |
Disclosure of detailed information about business combination [line items] |
Cash Payments | 1,750
Amount of shares issued | 625
Gold Line Resources Ltd [Member] | Paid and issued on third anniversary of purchase agreement [Member] |
Disclosure of detailed information about business combination [line items] |
Cash Payments | 3,000
Amount of shares issued | $ 0

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- Definition The fair value, at acquisition date, of cash transferred as consideration in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2021-01-01 -Paragraph B64 -Subparagraph f -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2021-en-r&anchor=para_B64_f_i&doctype=Appendix&subtype=B -URIDate 2021-03-24 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The fair value, at the acquisition date, of equity interests of the acquirer transferred as consideration in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2021-01-01 -Paragraph B64 -Subparagraph f -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2021-en-r&anchor=para_B64_f_iv&doctype=Appendix&subtype=B -URIDate 2021-03-24 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
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- Details
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- Details
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- Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
Name: | dei_LegalEntityAxis=emx_GoldLineResourcesLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |