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, 2022	Jan. 31, 2021
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive potentially outstanding common shares	1,554	2,364
Stock Options [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive potentially outstanding common shares	1,486	2,233
Restricted Stock Units [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive potentially outstanding common shares	32	55
Deferred Stock Units [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive potentially outstanding common shares	36	76