Investments (Tables)

6 Months Ended

Oct. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-For-Sale Debt Securities and Balance Sheet Classification

The following table summarizes the Company’s cash equivalents and available-for-sale marketable securities (in thousands):

	As of October 31, 2021								As of As of April 30, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Cash equivalents:
Money market funds	$	98,392	$	—	$	—	$	98,392	$	43,401	$	—	$	—	$	43,401
Corporate debt securities	2,588		—		—		2,588		—		—		—		—
Available-for-sale marketable securities:
U.S. treasury securities	2,000		—		—		2,000		57,993		5		—		57,998
Certificates of deposit	338,482		9		(1)		338,490		422,952		32		(6)		422,978
U.S. government agencies securities	15,815		—		(22)		15,793		—		—		—		—
Commercial paper	388,178		13		(1)		388,190		494,625		64		(13)		494,676
Corporate debt securities	160,470		7		(245)		160,232		2,369		—		(1)		2,368
Total cash equivalents and available-for-sale marketable securities	$	1,005,925	$	29	$	(269)	$	1,005,685	$	1,021,340	$	101	$	(20)	$	1,021,421

Summary of Available-For-Sale Debt Securities by Contractual Maturity

The following table summarizes the Company’s available-for-sale marketable securities by contractual maturity (in thousands):

	As of October 31, 2021				As of April 30, 2021
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Within one year	$	803,037	$	802,986	$	977,939	$	978,020
After one year through five years	101,908		101,719		—		—
Total	$	904,945	$	904,705	$	977,939	$	978,020

Summary of Available-For-Sale Marketable Securities, Fair Values and Unrealized Losses

The following table summarizes the fair values and unrealized losses of the Company’s available-for-sale marketable securities classified by length of time that the securities have been in a continuous unrealized loss position but were not deemed to be other-than-temporarily impaired, as of October 31, 2021 (in thousands):

	As of October 31, 2021
	Less Than 12 Months				12 Months or Greater				Total
	Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value
Certificates of deposit	$	(1)	$	29,399	$	—	$	—	$	(1)	$	29,399
U.S. government agencies securities	—		—		(22)		15,793		(22)		15,793
Commercial paper	(1)		29,667		—		—		(1)		29,667
Corporate debt securities	(73)		72,601		(172)		83,414		(245)		156,015
Total	$	(75)	$	131,667	$	(194)	$	99,207	$	(269)	$	230,874