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ROYALTY AND OTHER PROPERTY INTERESTS - Disclosure for detailed information for payments received in asset 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] |
Cash payments to be received | $ 563
Amount of shares to be received | 938
Upon signing of the agreement (paid and issued) [Member] |
Disclosure of detailed information about business combination [line items] |
Cash payments to be received | 0
Amount of shares to be received | 375
First anniversary of the purchase agreement (received) [Member] |
Disclosure of detailed information about business combination [line items] |
Cash payments to be received | 250
Amount of shares to be received | 250
Second anniversary of the purchase agreement [Member] |
Disclosure of detailed information about business combination [line items] |
Cash payments to be received | 313
Amount of shares to be received | $ 313

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- Definition Represents amount of shares to be received. + References No definition available. + Details
Name: | emx_AmountOfSharesToBeReceived
Namespace Prefix: | emx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Cash payments to be received. + References No definition available. + Details
Name: | emx_CashPaymentsToBeReceived
Namespace Prefix: | emx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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
Name: | ifrs-full_DisclosureOfBusinessCombinationsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_BusinessCombinationsAxis=emx_AgnicosOijarviGoldProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | emx_PaymentsToBeReceivedAxis=emx_PaymentsToBeReceivedUponSigningOfAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | emx_PaymentsToBeReceivedAxis=emx_PaymentsToBeReceivedOnFirstAnniversaryOfPurchaseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | emx_PaymentsToBeReceivedAxis=emx_PaymentsToBeReceivedOnSecondAnniversaryOfPurchaseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |