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Cash, Cash Equivalents, and Investments - Carrying Value of Investments (Details) - USD ($)
$ in Thousands
Apr. 30, 2024
Jan. 31, 2024
Debt Securities, Available-for-sale [Line Items]    
Cost Basis $ 210,905 $ 208,277
Unrealized Gain (Loss), Net (663) (99)
Estimated Fair Value 210,242 208,178
U.S. Treasury securities    
Debt Securities, Available-for-sale [Line Items]    
Cost Basis 56,750 50,012
Unrealized Gain (Loss), Net (67) 24
Estimated Fair Value 56,683 50,036
Commercial paper    
Debt Securities, Available-for-sale [Line Items]    
Cost Basis 17,128 2,887
Unrealized Gain (Loss), Net (26) (1)
Estimated Fair Value 17,102 2,886
Corporate debt securities    
Debt Securities, Available-for-sale [Line Items]    
Cost Basis 108,958 131,395
Unrealized Gain (Loss), Net (474) (136)
Estimated Fair Value 108,484 131,259
U.S. Government agency securities    
Debt Securities, Available-for-sale [Line Items]    
Cost Basis 28,069 23,983
Unrealized Gain (Loss), Net (96) 14
Estimated Fair Value $ 27,973 $ 23,997