Marketable Securities (Tables)

3 Months Ended

Jul. 31, 2020

Investments Debt And Equity Securities [Abstract]

Summary of Marketable Securities Held

The following tables summarize marketable securities held at July 31, 2020 and April 30, 2020 (in thousands):

	July 31, 2020
	Amortized		Unrealized		Unrealized			Estimated
	Cost		Gains		Losses			Fair Value
Corporate debt securities	$	34,154	$	268	$	(5	)	$	34,417
Obligations of the U.S. Government and its agencies		11,770		130		—			11,900
Total	$	45,924	$	398	$	(5	)	$	46,317

	April 30, 2020
	Amortized		Unrealized		Unrealized			Estimated
	Cost		Gains		Losses			Fair Value
Corporate debt securities	$	38,922	$	295	$	(1	)	$	39,216
Obligations of the U.S. Government and its agencies		12,534		175		—			12,709
Total	$	51,456	$	470	$	(1	)	$	51,925

Summary of Scheduled Maturity for Marketable Securities

The following table summarizes the scheduled maturity for the Company’s marketable securities at July 31, 2020 (in thousands):

	July 31, 2020
Maturing in one year or less	$	28,895
Maturing after one year through two years		7,570
Maturing after two years		9,852
Total	$	46,317