v3.26.1
Financial Instruments and Fair Value - Schedule of Available-for-Sale Securities Unrealized Loss Position at Fair Value (Detail) - USD ($)
$ in Thousands
Jul. 31, 2026
Jan. 31, 2026
Debt Securities, Available-for-Sale [Line Items]    
Less than 12 Months, Fair Value $ 123,645 $ 13,044
12 Months or Greater, Fair Value 0 0
Total, Fair Value 123,645 13,044
Less than 12 Months, Unrealized Losses (909) (28)
12 Months or Greater, Unrealized Losses 0 0
Total, Unrealized Losses (909) (28)
Corporate bonds [Member]    
Debt Securities, Available-for-Sale [Line Items]    
Less than 12 Months, Fair Value 85,218 2,691
12 Months or Greater, Fair Value 0 0
Total, Fair Value 85,218 2,691
Less than 12 Months, Unrealized Losses (587) (2)
12 Months or Greater, Unrealized Losses 0 0
Total, Unrealized Losses (587) (2)
Asset-backed securities [Member]    
Debt Securities, Available-for-Sale [Line Items]    
Less than 12 Months, Fair Value 15,016 3,582
12 Months or Greater, Fair Value 0 0
Total, Fair Value 15,016 3,582
Less than 12 Months, Unrealized Losses (114) (25)
12 Months or Greater, Unrealized Losses 0 0
Total, Unrealized Losses (114) (25)
U.S. government securities [Member]    
Debt Securities, Available-for-Sale [Line Items]    
Less than 12 Months, Fair Value 23,411 6,771
12 Months or Greater, Fair Value 0 0
Total, Fair Value 23,411 6,771
Less than 12 Months, Unrealized Losses (208) (1)
12 Months or Greater, Unrealized Losses 0 0
Total, Unrealized Losses $ (208) $ (1)