Income Taxes - Summary of Income Tax Provision (Recovery) (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax [Line Items]
Current	$ (660)	$ 3,672	$ (11)
Deferred	(2,866)	(6,462)	(5,855)
Provision For (Recovery Of) Income Taxes	(3,526)	(2,790)	(5,866)
US State [Member]
Income Tax [Line Items]
Current	135	260	8
Deferred	(176)	(434)	(751)
Provision For (Recovery Of) Income Taxes	(41)	(174)	(743)
Canadian [Member]
Income Tax [Line Items]
Current	(795)	3,412	(19)
Deferred	588	(1,149)	818
Provision For (Recovery Of) Income Taxes	(207)	2,263	799
US Federal [Member]
Income Tax [Line Items]
Deferred	(3,278)	(4,879)	(5,922)
Provision For (Recovery Of) Income Taxes	$ (3,278)	$ (4,879)	$ (5,922)

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration