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Financial Instruments and Fair Value - Schedule of Available-for-Sale Securities at Fair Value (Detail) - USD ($)
$ in Thousands
Jul. 31, 2023
Jan. 31, 2023
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost $ 103,805 $ 101,686
Unrealized Gains 41 116
Unrealized Losses (971) (608)
Fair Value 102,875 101,194
Money market funds [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 3,492 7,872
Unrealized Gains 0 0
Unrealized Losses 0 0
Fair Value 3,492 7,872
Commercial paper [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 9,382 18,333
Unrealized Gains 0 0
Unrealized Losses 0 0
Fair Value 9,382 18,333
Corporate bonds [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 42,870 23,472
Unrealized Gains 41 50
Unrealized Losses (398) (224)
Fair Value 42,513 23,298
Asset-backed securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 19,609 18,753
Unrealized Gains 0 44
Unrealized Losses (217) (149)
Fair Value 19,392 18,648
U.S. government securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 28,452 33,256
Unrealized Gains 0 22
Unrealized Losses (356) (235)
Fair Value $ 28,096 $ 33,043