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Strategic Investments - Radient Technologies Inc. (Details)
$ in Thousands
 12 Months Ended
Jun. 30, 2020
CAD ($)
shares
Jun. 30, 2019
CAD ($)
year
shares
Disclosure of financial assets [line items]    
Unrealized losses on marketable securities $ 43,613 $ 78,837
Unrealized loss on derivative investments 34,069 14,866
Losses recognised in other comprehensive income, fair value measurement, assets (11,955) (144,368)
Marketable securities designated at FVTOCI    
Disclosure of financial assets [line items]    
Unrealized losses on marketable securities 43,613 78,837
Derivatives and convertible debentures at FVTPL    
Disclosure of financial assets [line items]    
Unrealized loss on derivative investments $ 34,069 $ 14,866
Radient | Marketable securities designated at FVTOCI    
Disclosure of financial assets [line items]    
Total shareholdings (in shares) | shares 37,643,431 37,643,431
Fair value of financial instrument $ 6,000 $ 30,900
Unrealized losses on marketable securities $ 24,800 13,200
Radient | Warrants | Derivatives and convertible debentures at FVTPL    
Disclosure of financial assets [line items]    
Fair value of financial instrument   $ 100
Warrant expirations in period (in shares) | shares 4,541,889  
Unrealized loss on derivative investments $ 100  
Number of warrants held by entity (in shares) | shares   4,541,889
Losses recognised in other comprehensive income, fair value measurement, assets   $ 1,300
Risk-free interest rate | Radient | Warrants | Derivatives and convertible debentures at FVTPL    
Disclosure of financial assets [line items]    
Significant unobservable input, assets   0.0152
Dividend yield | Radient | Warrants | Derivatives and convertible debentures at FVTPL    
Disclosure of financial assets [line items]    
Significant unobservable input, assets   0
Historical volatility for shares | Radient | Warrants | Derivatives and convertible debentures at FVTPL    
Disclosure of financial assets [line items]    
Significant unobservable input, assets   0.7510
Expected life | Radient | Warrants | Derivatives and convertible debentures at FVTPL    
Disclosure of financial assets [line items]    
Significant unobservable input, assets | year   0.45