Note I - Stock-based Compensation (Tables)

3 Months Ended

Jul. 31, 2024

Notes Tables

Stock Option Plan Comparison [Table Text Block]

	Restated Option Plan
Minimum exercise price as a percentage of fair market value at  date of grant		100%
Last expiration date for outstanding options	May 9, 2034
Shares available for grant at July 31, 2024		90,233

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Three Months Ended July 31,
	2024			2023
Expected terms (years)		4.9			5.5
Risk-free interest rate		5.13	%		3.66	%
Volatility		60	%		58	%
Dividend yield		-			-

Schedule of Share-based Compensation, Stock Options, Exercises [Table Text Block]

	Three Months Ended July 31,
(Dollars in thousands)	2024		2023
Options exercised		-		30,000
Cash received from option exercises	$	-	$	-
Intrinsic value of options exercised	$	-	$	1,036