Investments

12 Months Ended

Apr. 30, 2023

Investments, Debt and Equity Securities [Abstract]

Cash Equivalents and Available-for-Sale Marketable Securities

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


	As of April 30, 2023								As of April 30, 2022
	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	$	75,293	$	—	$	—	$	75,293	$	107,726	$	—	$	—	$	107,726
Commercial paper	112,851		—		—		112,851		142,511		—		—		142,511
Corporate debt securities	—		—		—		—		8,889		—		(5)		8,884
Certificates of deposit	2,000		—		—		2,000		3,000		—		—		3,000
Available-for-sale marketable securities:
U.S. treasury securities	27,445		1		(49)		27,397		12,764		—		(1)		12,763
Certificates of deposit	61,025		—		—		61,025		97,205		—		—		97,205
U.S. government agencies securities	75,650		111		(87)		75,674		14,113		—		(223)		13,890
Commercial paper	184,230		—		—		184,230		241,134		—		(2)		241,132
Corporate debt securities	179,608		115		(476)		179,247		289,646		20		(1,937)		287,729
Total cash equivalents and available-for-sale marketable securities	$	718,102	$	227	$	(612)	$	717,717	$	916,988	$	20	$	(2,168)	$	914,840

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


	As of April 30, 2023				As of April 30, 2022
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Within one year	$	446,629	$	446,155	$	622,517	$	620,633
After one year through five years	81,329		81,418		32,345		32,086
Total	$	527,958	$	527,573	$	654,862	$	652,719

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 April 30, 2023 (in thousands):


	As of April 30, 2023
	Less Than 12 Months				12 Months or Greater				Total
	Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value
U.S. treasury securities	$	(49)	$	18,927	$	—	$	—	$	(49)	$	18,927

U.S. government agencies securities	(66)		12,263		(21)		16,858		(87)		29,121
Commercial paper	—		6,735		—		—		—		6,735
Corporate debt securities	(441)		107,316		(36)		16,577		(476)		123,893
Total	$	(556)	$	145,241	$	(57)	$	33,435	$	(612)	$	178,676

As of April 30, 2023, the Company had 119 investment positions that were in an unrealized loss position. As of April 30, 2022, the Company had 284 investment positions in an unrealized loss position. No investments were other-than-temporarily impaired as of April 30, 2023, 2022 or 2021. The Company considers factors such as the duration, the magnitude and the reason for the decline in value, the potential recovery period, creditworthiness of the issuers of the securities and its intent to sell. For marketable securities, it also considers whether (i) it is more likely than not that the Company will be required to sell the debt securities before recovery of their amortized cost basis, and (ii) the amortized cost basis cannot be recovered as a result of credit losses. No significant facts or circumstances have arisen to indicate that there has been any significant deterioration in the creditworthiness of the issuers of the securities held by the Company. Based on the Company’s review of these securities, including the assessment of the duration and severity of the unrealized losses and the Company’s ability and intent to hold the investments until maturity, there were no other-than-temporary impairments for these marketable securities as of April 30, 2023.