Marketable Securities (Tables)

3 Months Ended

Jul. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Summary of Fair Values of Company's Investments By Type

The following tables summarize the fair values of the Company’s investments by type as of July 31, 2022 and April 30, 2022 (in thousands):

	July 31, 2022
	Amortized		Unrealized		Unrealized			Estimated
	Cost		Gains		Losses			Fair Value
Corporate debt securities	$	89,149	$	15	$	(896	)	$	88,268
Obligations of the U.S. Government and its agencies		16,079		—		(135	)		15,944
Total	$	105,228	$	15	$	(1,031	)	$	104,212

	April 30, 2022
	Amortized		Unrealized		Unrealized			Estimated
	Cost		Gains		Losses			Fair Value
Corporate debt securities	$	112,997	$	2	$	(994	)	$	112,005
Obligations of the U.S. Government and its agencies		23,602				(137	)		23,465
Total	$	136,599	$	2	$	(1,131	)	$	135,470

Summary of Scheduled Maturity for Marketable Securities

The following table summarizes the scheduled maturity for the Company’s marketable securities at July 31, 2022 (in thousands):

	July 31, 2022
Maturing in one year or less	$	85,071
Maturing after one year through two years		13,265
Maturing after two years through four years		5,876
Total	$	104,212