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Note I - Stock-based Compensation Plans (Tables)

3 Months Ended

Jul. 31, 2022

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 1, 2032
Shares available for grant at July 31, 2022			185,000

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

		Three Months Ended July 31,
		2022				2021
Expected terms (years)			5.5				5.5
Risk-free interest rate			2.92	%			0.86	%
Volatility			51	%			51	%
Dividend yield			-				-

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

		Three Months Ended July 31,
(Dollars in thousands)		2022				2021
Options exercised			23,000				36,500
Cash received from option exercises		$	1,216			$	251
Intrinsic value of options exercised		$	1,204			$	3,565

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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