Summary of Significant Accounting Policies (Tables)

3 Months Ended

Jul. 31, 2022

Accounting Policies [Abstract]

Schedule of Potential Dilutive Common Share Equivalents

Potential dilutive common share equivalents consist of:

	July 31,
	2022		2021
Stock options and awards		4,697,733		3,507,452

Schedule of Cash Equivalents and Marketable Securities Measured at Fair Value

The following tables summarize the cash equivalents and marketable securities measured at fair value on a recurring basis as of July 31, 2022 and April 30, 2022 (in thousands):

							Balance at
	Level 1		Level 2		Level 3		July 31, 2022
Cash equivalents	$	30,695	$	—	$	—	$	30,695
Marketable securities:
Corporate debt securities		—		88,268		—		88,268
U.S. government agency securities		—		15,944		—		15,944
	$	30,695	$	104,212	$	—	$	134,907

							Balance at
	Level 1		Level 2		Level 3		April 30, 2022
Cash equivalents	$	13,735	$	—	$	—	$	13,735
Marketable securities:
Corporate debt securities		—		112,005		—		112,005
U.S. government agency securities		—		23,465		—		23,465
	$	13,735	$	135,470	$	—	$	149,205