The amount of consideration paid or received released from escrow.

No definition available.

Name:	emx_ConsiderationReceivedThroughReleasedFromEscrow
Namespace Prefix:	emx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents amount related to receivables from sales of investments accounted for using equity method.

+ References

No definition available.

+ Details

Name:	emx_ReceivablesFromSalesOfInvestmentsAccountedForUsingEquityMethod
Namespace Prefix:	emx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of consideration paid or received to be held in escrow.

+ References

No definition available.

+ Details

Name:	emx_RemainingConsiderationReceivedHeldInEscrow
Namespace Prefix:	emx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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

- Definition

The amount of consideration paid or received in respect of both obtaining and losing control of subsidiaries or other businesses. [Refer: Subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2018-01-01
-Paragraph 40
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=para_40_a&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_ConsiderationPaidReceived
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow from sales of investments accounted for using the equity method. [Refer: Investments accounted for using equity method]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2018-01-01
-Paragraph 16
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=para_16&doctype=Standard
-URIDate 2018-03-16

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	ifrs-full_SignificantInvestmentsInAssociatesAxis=emx_IGCopperLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

NATURE OF OPERATIONS AND GOING CONCERN (Narrative) (Details) $ in Millions	1 Months Ended		12 Months Ended
	Oct. 31, 2018 CAD ($)	Oct. 31, 2018 USD ($)	Dec. 31, 2018 CAD ($)
Statements Line Items
Initial cash distribution			$ 84,246,645
IG Copper, LLC [Member]
Statements Line Items
Consideration received		$ 200
Consideration received released from escrow		190
Remaining consideration received held in escrow		10
Initial cash distribution	$ 84,246,645
Second cash distribution, receivable	$ 5,450,764	$ 4