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Strategic Investments - Alcanna Inc. (Details) $ / shares in Units, $ in Thousands | 12 Months Ended
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Jun. 30, 2020 CAD ($) $ / shares shares | Jun. 30, 2020 $ / shares shares | Jun. 30, 2019 CAD ($) shares
Disclosure of associates [line items] |  |  |
Average share price (in CAD per share) | (per share) | $ 27.85 | $ 20.73 |
Impairment | $ | $ 75,035 |  | $ 88,932
Alcanna |  |  |
Disclosure of associates [line items] |  |  |
Number of shares sold (in shares) | 9,200,000 |  |
Proportion of ownership interest in associate | 24.80% |  |
Proceeds from sale of common shares | $ | $ 27,600 |  |
Average share price (in CAD per share) | $ / shares | $ 3.00 |  |
Gain on deemed disposal of significant influence investment | $ | $ 12,000 |  |
Impairment | $ | $ 27,748 |  | $ 68,696
Total shareholdings (in shares) | 0 | 0 |
Warrants | Derivatives and convertible debentures at FVTPL | Alcanna |  |  |
Disclosure of associates [line items] |  |  |
Warrant expirations in period (in shares) | 10,130,000 |  |
Warrant cancellations in period (in shares) | 1,750,000 |  |
Number of warrants held by entity (in shares) | 0 | 0 | 11,880,000

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