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MAJOR SOURCES OF REVENUE (Details) - Royalty revenue - Concentration of risk by operator - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2013
Thompson Creek Metals Company Inc |  |  |
Major sources of revenue |  |  |
Revenue | $ 94,104 | $ 27,209 |
Percentage of total revenue | 33.80% | 11.50% |
Teck |  |  |
Major sources of revenue |  |  |
Revenue | $ 38,033 | $ 48,777 | $ 82,272
Percentage of total revenue | 13.70% | 20.60% | 28.40%
Goldcorp, Inc |  |  |
Major sources of revenue |  |  |
Revenue | $ 32,117 | $ 32,339 | $ 32,461
Percentage of total revenue | 11.60% | 13.60% | 11.20%
Vale Newfoundland & Labrador Limited |  |  |
Major sources of revenue |  |  |
Revenue | $ 16,665 | $ 25,128 | $ 32,517
Percentage of total revenue | 6.00% | 10.60% | 11.20%

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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