Annual report pursuant to Section 13 and 15(d)

Net Loss Per Share - Schedule of Anti-dilutive Securities Excluded from Computation of Loss Per Share (Detail)

v3.20.1
Net Loss Per Share - Schedule of Anti-dilutive Securities Excluded from Computation of Loss Per Share (Detail) - shares
shares in Thousands
12 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Anti-dilutive potentially outstanding common shares 1,351 4,094
Stock Options [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Anti-dilutive potentially outstanding common shares 1,290 3,245
Restricted Stock Units [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Anti-dilutive potentially outstanding common shares 51 264
Deferred Stock Units [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Anti-dilutive potentially outstanding common shares 10 18
Performance Stock Units (PSUs) [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Anti-dilutive potentially outstanding common shares   567