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v3.19.1

Disclosure of detailed information about royalty interests (Details) - CAD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Statements Line Items |  |  |
Royalty interest, beginning balance | $ 21,943,743 | $ 25,831,152 | $ 28,798,980
Acquisition |  |  | 145,000
Depletion | (1,732,270) | (2,282,276) | (2,163,221)
Impairment of royalty interest | (7,256,340) |  |
Cumulative translation adjustments | (1,391,270) | 1,605,133 | 949,607
Royalty interest, ending balance | $ 14,346,403 | $ 21,943,743 | $ 25,831,152

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- Definition CTA loss on royalty interest + References No definition available. + Details
Name: | emx_RoyalInterestCumulativeTranslationAdjustments
Namespace Prefix: | emx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Royalty interest + References No definition available. + Details
Name: | emx_RoyaltyInterest
Namespace Prefix: | emx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Acquisition + References No definition available. + Details
Name: | emx_RoyaltyInterestAcquisition
Namespace Prefix: | emx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Depletion + References No definition available. + Details
Name: | emx_RoyaltyInterestDepletion
Namespace Prefix: | emx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Impairment charge + References No definition available. + Details
Name: | emx_RoyaltyInterestImpairmentCharge
Namespace Prefix: | emx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Statement [Line Items] + References No definition available. + Details
Name: | emx_StatementsLineItems
Namespace Prefix: | emx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration