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Net Loss Per Ordinary Share - Anti-Dilutive Shares Excluded from Calculation of Diluted Net Loss Per Ordinary Share (Detail) - shares
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Options to Purchase Ordinary Shares [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive shares excluded from calculation of diluted net loss per share 4,588,951 4,320,605
RSUs [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive shares excluded from calculation of diluted net loss per share 2,022,268 1,272,350
Series A Preferred Shares [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive shares excluded from calculation of diluted net loss per share 3,901,348 3,901,348