Marketable Securities (Tables)

6 Months Ended

Jul. 31, 2023

Investments, Debt and Equity Securities [Abstract]

Schedule of Marketable Securities

The following is a summary of our marketable securities (in thousands): 

	As of July 31, 2023
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Commercial paper	$	61,740	$	—	$	—	$	61,740
Treasury bills and U.S. government securities (1)	555,966		—		(418)		555,548
Corporate bonds	10,809		—		(39)		10,770
Municipal bonds	1,751		—		(15)		1,736
Agency bonds	106,034		—		(158)		105,876
Total marketable securities	$	736,300	$	—	$	(630)	$	735,670
(1) Treasury bills with both amortized cost and estimated fair value of $39.8 million are included in cash and cash equivalents due to their original maturity of three months or less.

	As of January 31, 2023
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Commercial paper	$	62,470	$	—	$	—	$	62,470
Treasury bills and U.S. government securities (1)	234,848		—		(308)		234,540
Corporate bonds	46,684		—		(198)		46,486
Municipal bonds	6,374		—		(66)		6,308
Agency bonds	7,959		—		(47)		7,912
Total marketable securities	$	358,335	$	—	$	(619)	$	357,716
(1) Treasury bills with both amortized cost and estimated fair value of $10.0 million are included in cash and cash equivalents due to their original maturity of three months or less.