Assets Held for Sale - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2020	Dec. 31, 2019
Assets Of Disposal Group Including Discontinued Operation [Line Items]
Indefinite-lived intangible asset, Impairment	$ 27,004	$ 106,687
Cultivation License [Member]
Assets Of Disposal Group Including Discontinued Operation [Line Items]
Indefinite-lived intangible asset, Impairment	10,239
High Park Gardens Facility [Member] \| Cannabis Reportable Segment [Member]
Assets Of Disposal Group Including Discontinued Operation [Line Items]
Impairment charges of assets classified as held for sale	25,051
Impairment charge of land and building	13,616
Impairment charge on foreign currency translation adjustments	1,196
High Park Gardens Facility [Member] \| Cannabis Reportable Segment [Member] \| Cultivation License [Member]
Assets Of Disposal Group Including Discontinued Operation [Line Items]
Indefinite-lived intangible asset, Impairment	$ 10,239

Assets of disposal group including discontinued operation.

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Impairment charge on foreign currency translation adjustments.

+ References

No definition available.

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- Definition

Land and building write down.

+ References

No definition available.

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- Definition

Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2611-110228

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