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Property Plant and Equipment - Additional Information (Details) - CAD ($) |  | 3 Months Ended | 10 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 28, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2018 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |  |  |
Capitalized salaries and benefits |  |  |  |  | $ 0 | $ 600,000
Construction in progress |  |  |  |  |  | 600,000
Interest associated with construction in progress |  |  |  |  | 0 | 1,300,000
Depreciation, capitalized to biological assets and inventory |  |  |  |  | 6,900,000 | 5,700,000
Asset impairment |  |  |  | $ 523,000 | $ 79,191,000 | $ 162,000
Alberta CGU |  |  |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |  |  |
Impairment discount rate |  |  |  |  | 25.00% |
Estimated cash flow term |  |  |  |  | 5 years |
Asset impairment |  | $ 60,000,000 |  |  |  |
Increase impairment discount rate |  |  |  |  | 1.00% |
Increase of Impairment on Assets |  |  |  |  | $ 9,200,000 |
Rocky View Facility | Non-Binding Purchase Agreement |  |  |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |  |  |
Fair value less costs of disposal and impairment | $ 5,000,000 |  |  |  |  |
Write down assets to recoverable amount | 700,000 |  |  |  |  |
Recoverable amount reduced due to receiving utility deposits | $ 5,000,000 |  |  |  |  |
Kamloops Property | Merritt Facility |  |  |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |  |  |
Investment of land and construction in progress in Merritt facility |  |  |  |  | 10,000,000 |
Kamloops Property | Merritt Facility | B.C. Cash Generating Unit |  |  |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |  |  |
Fair value less costs of disposal and impairment |  |  |  |  | 5,700,000 |
Write down assets to recoverable amount |  |  |  |  | 4,200,000 |
Recoverable amount reduced due to receiving utility deposits |  |  |  |  | 2,900,000 |
Other Disposals of Assets | Cannabis |  |  |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |  |  |
Proceeds from sales of non-core assets |  |  |  |  | $ 2,100,000 |
Sale of property closing date |  |  |  |  | Mar. 27, 2020 |

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