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CASH AND CASH EQUIVALENTS, INVESTMENTS, AND FAIR VALUE MEASUREMENTS (Tables)
 6 Months Ended
Jul. 31, 2025
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets Measured on Recurring Basis
The following tables summarize information about our cash, cash equivalents, and investments by investment category as of July 31, 2025 and January 31, 2025 (in thousands):

As of July 31, 2025
Fair Value LevelAmortized CostGross Unrealized GainsGross Unrealized LossesEstimated Fair Value
Assets
Cash and cash equivalents:
Cash$99,118 $— $— $99,118 
Money market fundsLevel 1178,887 — — 178,887 
Total cash and cash equivalents$278,005 $— $— $278,005 
Short-term investments:
U.S. treasury securitiesLevel 1$233,244 $513 $(44)$233,713 
Commercial paperLevel 24,972 — (1)4,971 
Corporate notes and bondsLevel 2269,726 514 (25)270,215 
U.S. agency securitiesLevel 223,907 12 — 23,919 
Total short-term investments$531,849 $1,039 $(70)$532,818 
Long-term investments:
U.S. treasury securitiesLevel 1$175,835 $208 $(145)$175,898 
Corporate notes and bondsLevel 2132,653 98 (204)132,547 
U.S. agency securitiesLevel 28,500 — (44)8,456 
Total long-term investments$316,988 $306 $(393)$316,901 
Total assets measured at fair value$1,126,842 $1,345 $(463)$1,127,724 
As of January 31, 2025
Fair Value LevelAmortized CostGross Unrealized GainsGross Unrealized LossesEstimated Fair Value
Assets
Cash and cash equivalents:
Cash$94,728 $— $— $94,728 
Money market fundsLevel 161,962 — — 61,962 
U.S. treasury securitiesLevel 19,969 3 — 9,972 
Commercial paperLevel 219,914 — (2)19,912 
Total cash and cash equivalents$186,573 $3 $(2)$186,574 
Short-term investments:
U.S. treasury securitiesLevel 1$208,918 $284 $(74)$209,128 
Commercial paperLevel 224,606 1 (2)24,605 
Corporate notes and bondsLevel 2238,610 586 (6)239,190 
U.S. agency securitiesLevel 262,257 151 — 62,408 
Total short-term investments$534,391 $1,022 $(82)$535,331 
Long-term investments:
U.S. treasury securitiesLevel 1$208,104 $787 $(203)$208,688 
Corporate notes and bondsLevel 2173,882 573 (331)174,124 
U.S. agency securitiesLevel 213,458 — (63)13,395 
Total long-term investments$395,444 $1,360 $(597)$396,207 
Total assets measured at fair value$1,116,408 $2,385 $(681)$1,118,112