Share-Based Payments - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2021 shares
Share-Based Payments [Line iteam]
Number of stock options outstanding, Granted during the period	75,600
Share options [Member] | Employees [Member]
Share-Based Payments [Line iteam]
Number of stock options outstanding, Granted during the period	75,600
Restricted Stock Units [Member]
Share-Based Payments [Line iteam]
Number of RSU outstanding, Granted during the period	24,900
Restricted Stock Units [Member] | Employees [Member]
Share-Based Payments [Line iteam]
Number of RSU outstanding, Granted during the period	24,900