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EVENTS SUBSEQUENT TO THE REPORTING DATE (Narrative) (Details)
 12 Months Ended
Dec. 31, 2018
CAD ($)
Share
shares
Dec. 31, 2018
USD ($)
Share
shares
Dec. 31, 2017
CAD ($)
Share
Dec. 31, 2016
CAD ($)
Share
Statements Line Items        
Number of shares issued | shares 3,000,000 3,000,000    
Proceeds from the exercise stock options | $ $ 186,100   $ 85,700 $ 127,800
Number of stock options | Share 192,500 192,500 75,000 165,000
Events subsequent to the reporting date sweden Norway corporation projects [Member] | Norra Metals Corp. ("Norra")        
Statements Line Items        
Number of shares acquired | shares 4,808,770 4,808,770    
Project ownership percentage acquired 9.90% 9.90%    
Events subsequent to the reporting date British Columbia [Member]        
Statements Line Items        
Definitive sales agreement, description of net smelter royalty The Company will retain a 3% NSR royalty on the projects. EMX has also been granted a 1% NSR royalty on Norra’s Pyramid project in British Columbia. The Company will retain a 3% NSR royalty on the projects. EMX has also been granted a 1% NSR royalty on Norra’s Pyramid project in British Columbia.    
Events subsequent to the reporting date British Columbia [Member] | Norra Metals Corp. ("Norra")        
Statements Line Items        
Definitive sales agreement, description of net smelter royalty The Company will retain a 3% NSR royalty on the projects. The Company will retain a 3% NSR royalty on the projects.    
Events subsequent to the reporting date Norway with Playfair Mining Ltd [Member]        
Statements Line Items        
Definitive sales agreement, description of net smelter royalty 9.9% interest in Playfair, a 3% NSR royalty on the projects, and advance royalty payments. Pursuant to the agreement, Playfair can earn a 100% interest in the project by the issuance of 3,000,000 common shares to EMX and performance of certain work during the option period. 9.9% interest in Playfair, a 3% NSR royalty on the projects, and advance royalty payments. Pursuant to the agreement, Playfair can earn a 100% interest in the project by the issuance of 3,000,000 common shares to EMX and performance of certain work during the option period.    
Option agreement, interest 100.00% 100.00%    
Subsequent Events [Member]        
Statements Line Items        
Proceeds from the exercise stock options | $   $ 554,520    
Number of stock options | Share 475,100 475,100