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Note I - Stock-based Compensation (Tables)

3 Months Ended

Jul. 31, 2020

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, 2030
Shares available for grant at July 31, 2020		45,000

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

		Three Months Ended July 31,
		2020				2019
Expected term (years)			5.5				5.5
Risk-free interest rate			0.36	%			2.28	%
Volatility			50	%			39	%
Dividend yield			-				-

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

		Three Months Ended July 31,
(Dollars in thousands)		2020				2019
Options exercised			22,000				21,500
Cash received from option exercises		$	1,166			$	80
Intrinsic value of options exercised		$	793			$	1,284

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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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