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EVENTS SUBSEQUENT TO THE REPORTING DATE (Narrative) (Details) | 12 Months Ended
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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 |  |

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