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Stockholders' Equity and Share-Based Compensation - Schedule of Transactions Related to Stock Option Awards (Detail) - 2014 Stock Incentive Plan
shares in Thousands, $ in Millions
 3 Months Ended
Apr. 30, 2023
USD ($)
shares
Number of Options  
Options outstanding, beginning (in shares) 2,870
Granted (in shares) 340
RSU vestings (in shares) (60)
Forfeited (in shares) (20)
Options outstanding, ending (in shares) 3,130
Remaining unrecognized compensation expense | $ $ 53.2
Options  
Number of Options  
Options outstanding, beginning (in shares) 980
Granted (in shares) 80
Forfeited (in shares) 0
Options outstanding, ending (in shares) 1,060
Remaining unrecognized compensation expense | $ $ 6.6
Restricted Stock Units  
Number of Options  
Options outstanding, beginning (in shares) 1,890
Granted (in shares) 260
RSU vestings (in shares) (60)
Forfeited (in shares) (20)
Options outstanding, ending (in shares) 2,070
Remaining unrecognized compensation expense | $ $ 46.6