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Strategic Investments - Alcanna Inc. (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
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