Government Grants and Credits - Component of Government Grants and Credits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CEWS and CERS subsidies
Government Grants And Credits [Line Items]
Research and development collaborations (note 12)	$ 3,402	$ 3,031	$ 0
SR&ED credits, net
Government Grants And Credits [Line Items]
Research and development collaborations (note 12)	78	142	110
Grant
Government Grants And Credits [Line Items]
Research and development collaborations (note 12)	$ 3,480	$ 3,173	$ 110