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Income Taxes - Summary of income tax provision (recovery) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current	$ (11)	$ 430	$ 29
Deferred	(5,855)	(2,730)	(792)
Provision For (Recovery Of) Income Taxes	(5,866)	(2,300)	(763)
Federal [member]
Current	0		(232)
Deferred	(5,922)	(1,786)	(1,044)
Provision For (Recovery Of) Income Taxes	(5,922)	(1,786)	(1,276)
State [member]
Current	8	8	24
Deferred	(751)	(187)	(120)
Provision For (Recovery Of) Income Taxes	(743)	(179)	(96)
Foreign [member]
Current	(19)	422	237
Deferred	818	(757)	372
Provision For (Recovery Of) Income Taxes	$ 799	$ (335)	$ 609

X

- Definition

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

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