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Property, Plant and Equipment - Narrative (Details) - CAD ($) | 1 Months Ended | 3 Months Ended | 5 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Nov. 25, 2019 | Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Mar. 31, 2019 | Nov. 25, 2019 | Mar. 31, 2020 | Mar. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Borrowing costs capitalized to construction in progress |  |  |  |  |  |  |  |  | $ 22,000,000 | $ 25,200,000
Weighted average interest rate for capitalization |  |  |  |  |  |  |  |  | 13.00% | 14.00%
Property, plant and equipment, temporarily idle |  | $ 216,000,000 |  | $ 0 |  |  |  |  | $ 216,000,000 | $ 0
Depreciation expense |  |  |  |  |  |  |  |  | 74,500,000 | 45,400,000
Depreciation expense recognized in cost of goods sold |  |  |  |  |  |  |  |  | 27,200,000 | 12,200,000
Impairment loss recognised in profit or loss, property, plant and equipment |  |  |  |  |  |  |  |  | 148,234,000 |
Impairment loss recognised in profit or loss |  |  |  |  |  |  |  |  | 75,035,000 | $ 88,932,000
Canadian Hemp Cash Generating Unit [Member] |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Recoverable amount of CGU |  |  | $ 200,000 |  |  |  | $ 200,000 |  |  |
Impairment loss recognised in profit or loss |  | 0 | $ 9,800,000 | $ 0 | $ 0 |  | $ 9,800,000 | $ 0 |  |
Latin American Hemp and European Hemp CGUs |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  |  |  |  |  |  |  | $ 15,900,000 |
Computer software & equipment |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Estimated useful life |  |  |  |  |  |  |  |  | 3 years |
Furniture & fixtures |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Estimated useful life |  |  |  |  |  |  |  |  | 5 years |
Aurora Sun Facility |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, temporarily idle |  | 212,100,000 |  |  |  |  |  |  | $ 212,100,000 |
Nordic Sky Facility |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, temporarily idle |  | $ 3,900,000 |  |  |  |  |  |  | 3,900,000 |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  |  |  |  |  |  |  | 34,600,000 |
Production Facilities |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  |  |  |  |  |  |  | $ 86,500,000 |
Bottom of range | Production & other equipment |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Estimated useful life |  |  |  |  |  |  |  |  | 2 years |
Bottom of range | Building & Improvements |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Estimated useful life |  |  |  |  |  |  |  |  | 20 years |
Top of range | Production & other equipment |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Estimated useful life |  |  |  |  |  |  |  |  | 4 years |
Top of range | Building & Improvements |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Estimated useful life |  |  |  |  |  |  |  |  | 30 years |
Exeter Property |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment | $ 11,000,000 |  |  |  |  | $ 1,400,000 |  |  |  |
Proceeds from disposal |  |  |  |  |  |  |  |  | $ 8,607,000 |
Exeter Property | Building & Improvements |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Proceeds from disposal |  |  |  |  |  |  |  |  | 7,214,000 |
Cost | Exeter Property |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Transfer of land and real estate to held for sale |  |  |  |  |  |  |  |  | 18,200,000 |
Owned assets |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  |  |  |  |  |  |  | 145,818,000 |
Owned assets | Canadian Hemp Cash Generating Unit [Member] |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  |  |  |  |  |  |  | 7,400,000 |
Owned assets | Computer software & equipment |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  |  |  |  |  |  |  | 108,000 |
Owned assets | Production & other equipment |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  |  |  |  |  |  |  | 24,216,000 |
Owned assets | Furniture & fixtures |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  |  |  |  |  |  |  | 139,000 |
Owned assets | Building & Improvements |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  |  |  |  |  |  |  | 82,721,000 |
Right-of-use lease assets |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  |  |  |  |  |  |  | 2,416,000 |
Right-of-use lease assets | Canadian Hemp Cash Generating Unit [Member] |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  |  |  |  |  |  |  | 2,400,000 |
Right-of-use lease assets | Production & other equipment |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  |  |  |  |  |  |  | 0 |
Right-of-use lease assets | Building & Improvements |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |  |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  |  |  |  |  |  |  | $ 2,416,000 |

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