Government Grants and Credits - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Government Grants And Credits [Line Items]
Accrued refundable investment tax credits	$ 78
Canada Emergency Wage Subsidy
Government Grants And Credits [Line Items]
Research and development collaborations (note 12)	2,805	$ 3,005
Canada Emergency Rent Subsidy
Government Grants And Credits [Line Items]
Research and development collaborations (note 12)	$ 597	$ 26