Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Non-cash impairment charge of intangible assets				$ 27,004		$ 106,687
Non-cash impairment charge of intangible assets				8,188
Amortization expenses for intangible assets		$ 2,765	$ 2,529	7,603	$ 6,131
Separation from Smith & Sinclair [Member]
Finite Lived Intangible Assets [Line Items]
Additional non-cash impairment charges	$ 3,320
High Park Gardens Facility [Member]
Finite Lived Intangible Assets [Line Items]
Non-cash impairment charge of intangible assets				10,239
ABG Prince Agreement [Member]
Finite Lived Intangible Assets [Line Items]
Non-cash impairment charge of intangible assets				6,063
ABG Profit Participation Agreement [Member]
Finite Lived Intangible Assets [Line Items]
Non-cash impairment charge of intangible assets				$ 16,765
CBD Trademarks and Patents [Member] | Separation from Smith & Sinclair [Member]
Finite Lived Intangible Assets [Line Items]
Additional non-cash impairment charges	$ 2,126