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DISCRETIONARY BONUSES (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018 CAD ($)
Statements Line Items
Discretionary bonuses awarded to management and staff	$ 5,224,284

X

- Definition

Represents amount of discretionary bonus.

+ References

No definition available.

+ Details

Name:	emx_KeyManagementPersonnelCompensationDiscretionaryBonus
Namespace Prefix:	emx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- 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