Marketable Securities (Tables)

3 Months Ended

Apr. 30, 2026

Investments, Debt and Equity Securities [Abstract]

Components of Marketable Securities

Marketable securities consist of the following for the periods presented (in thousands):


			April 30, 2026
			Cost or Amortized Cost						Gross Unrealized Gains						Gross Unrealized Losses						Total Estimated Fair Value
U.S. government securities			$	157,809					$	244					$	(128)					$	157,925
Corporate debt securities			84,339						139						(171)						84,307
Total			$	242,148					$	383					$	(299)					$	242,232


			January 31, 2026
			Cost or Amortized Cost						Gross Unrealized Gains						Gross Unrealized Losses						Total Estimated Fair Value
U.S. government securities			$	188,270					$	968					$	—					$	189,238
Corporate debt securities			97,931						411						—						98,342
Total			$	286,201					$	1,379					$	—					$	287,580

Marketable Securities by Contractual Maturity

The contractual maturities of the investments classified as available-for-sale marketable securities are as follows (in thousands):


			April 30, 2026
			Amortized Cost						Estimated Fair Value
Due within 1 year			$	108,614					$	108,730
Due in 1 year through 5 years			133,534						133,502
Total			$	242,148					$	242,232


			January 31, 2026
			Amortized Cost						Estimated Fair Value
Due within 1 year			$	115,437					$	115,723
Due in 1 year through 5 years			170,764						171,857
Total			$	286,201					$	287,580

Investment Income


			Three Months Ended April 30,
			2026						2025
Interest income			$	2,985					$	4,781
Accretion/amortization of discount/premium, net			78						399
Investment income			$	3,063					$	5,180