Share-Based Payments - Summary of Share-Based Payments Expenses (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payments	$ (976)	$ (1,551)	$ (3,416)	$ (4,078)
Research & Development expenses [Member] | Employee Stock Option Member
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payments	(337)	(273)	(1,002)	(952)
Research & Development expenses [Member] | Restricted Stock Units [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payments	(201)	(660)	(594)	(795)
Sales & Marketing expenses [Member] | Employee Stock Option Member
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payments	30	(60)	(3)	(172)
Sales & Marketing expenses [Member] | Restricted Stock Units [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payments	20	(27)	4	(75)
General & Administrative expenses [Member] | Employee Stock Option Member
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payments	(423)	(439)	(1,599)	(1,791)
General & Administrative expenses [Member] | Restricted Stock Units [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payments	$ (66)	$ (92)	$ (223)	$ (293)