Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2020	Dec. 31, 2019
Finite and Indefinite Lived Intangible Assets [Line Items]
Definite-lived intangible asset, Cost	$ 154,596	$ 158,035
Definite-lived intangible asset, Accumulated Amortization	19,680	12,077
Definite-lived intangible asset, Impairment	8,188
Definite-lived intangible asset, Net	126,728	145,958
Indefinite-lived intangible asset, Cost	81,129	189,557
Indefinite-lived intangible asset, Impairment	27,004	106,687
Indefinite-lived intangible asset, Net	54,125	82,870
Total intangible asset, Cost	235,725	347,592
Total intangible asset, Impairment	35,192	106,687
Total intangible asset, Net	180,853	228,828
Patents [Member]
Finite and Indefinite Lived Intangible Assets [Line Items]
Definite-lived intangible asset, Cost	669	716
Definite-lived intangible asset, Accumulated Amortization	131	99
Definite-lived intangible asset, Impairment	538
Definite-lived intangible asset, Net		617
Customer Relationships [Member]
Finite and Indefinite Lived Intangible Assets [Line Items]
Definite-lived intangible asset, Cost	132,837	135,953
Definite-lived intangible asset, Accumulated Amortization	13,241	7,132
Definite-lived intangible asset, Net	119,596	128,821
Developed Technology [Member]
Finite and Indefinite Lived Intangible Assets [Line Items]
Definite-lived intangible asset, Cost	6,912	7,074
Definite-lived intangible asset, Accumulated Amortization	1,094	590
Definite-lived intangible asset, Net	5,818	6,484
Websites [Member]
Finite and Indefinite Lived Intangible Assets [Line Items]
Definite-lived intangible asset, Cost	5,126	5,157
Definite-lived intangible asset, Accumulated Amortization	3,921	3,331
Definite-lived intangible asset, Net	1,205	1,826
Trademarks and Licenses [Member]
Finite and Indefinite Lived Intangible Assets [Line Items]
Definite-lived intangible asset, Cost	9,052	9,135
Definite-lived intangible asset, Accumulated Amortization	1,293	925
Definite-lived intangible asset, Impairment	7,650
Definite-lived intangible asset, Net	109	8,210
Cultivation License [Member]
Finite and Indefinite Lived Intangible Assets [Line Items]
Indefinite-lived intangible asset, Cost	10,239	10,689
Indefinite-lived intangible asset, Impairment	10,239
Indefinite-lived intangible asset, Net		10,689
Alef License [Member]
Finite and Indefinite Lived Intangible Assets [Line Items]
Indefinite-lived intangible asset, Cost		4,086
Indefinite-lived intangible asset, Impairment		4,086
Trademarks [Member]
Finite and Indefinite Lived Intangible Assets [Line Items]
Indefinite-lived intangible asset, Cost	54,125	55,416
Indefinite-lived intangible asset, Net	54,125	55,416
Rights under ABG Profit Participation Arrangement [Member]
Finite and Indefinite Lived Intangible Assets [Line Items]
Indefinite-lived intangible asset, Cost	16,765	119,366
Indefinite-lived intangible asset, Impairment	$ 16,765	102,601
Indefinite-lived intangible asset, Net		$ 16,765

Finite and indefinite lived intangible assets.

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Indefinite lived intangible assets excluding goodwill gross.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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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.

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