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Note I - Stock-based Compensation (Tables)

6 Months Ended

Oct. 31, 2021

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, 2031
Shares available for grant at October 31, 2021	215,000

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

		Six Months Ended October 31,
		2021				2020
Expected term (years)			5.5				5.5
Risk-free interest rate			0.86	%			0.36	%
Volatility			51	%			50	%
Dividend yield			-				-

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

		Six Months Ended October 31,
(Dollars in thousands)		2021				2020
Options exercised			56,500				55,566
Cash received from option exercises		$	251			$	2,548
Intrinsic value of options exercised		$	4,896			$	2,439

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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 http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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