Marketable Securities (Tables)

3 Months Ended

Apr. 30, 2021

Investments, Debt and Equity Securities [Abstract]

Summary of Available-for-sale Marketable Securities Excluding Securities Classified within Cash and Cash Equivalents on Consolidated Balance Sheets

The following is a summary of available-for-sale marketable securities, excluding those securities classified within cash and cash equivalents on the condensed consolidated balance sheets (in thousands):

	April 30, 2021
	Amortized Costs		Unrealized Gains		Unrealized Losses		Fair Value
U.S. treasury securities	$	227,010	$	57	$	(1)	$	227,066
Corporate notes and bonds	10,447		43		—		10,490
Certificates of deposit	280		—		—		280
Total marketable securities	$	237,737	$	100	$	(1)	$	237,836

	January 31, 2021
	Amortized Costs		Unrealized Gains		Unrealized Losses		Fair Value
U.S. treasury securities	$	268,141	$	29	$	(1)	$	268,169
Corporate notes and bonds	14,487		100		—		14,587
Certificates of deposit	280		—		—		280
Total marketable securities	$	282,908	$	129	$	(1)	$	283,036

Schedule of Fair Values of Available-for-sale Marketable Securities by Remaining Contractual Maturity

As of April 30, 2021, the fair values of available-for-sale marketable securities, by remaining contractual maturity, were as follows (in thousands):

Due within one year	$	179,753
Due in one year through five years	58,083
Total	$	237,836