Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) shares in Thousands, $ in Thousands	Oct. 31, 2022	Apr. 30, 2022
Statement of Financial Position [Abstract]
Allowance for doubtful accounts (in Dollars)	$ 111	$ 111
Preferred stock, par value (in Dollars per share)	$ 1	$ 1
Preferred stock - shares authorized	600	600
Preferred stock - shares issued	0	0
Common stock, par value (in Dollars per share)	$ 1	$ 1
Common stock shares issued	9,334	9,298
Common stock - authorized shares	20,000	20,000
Common stock - shares outstanding	9,333	9,297
Common stock reacquired and held in treasury - share	1	1

Amount of allowance for credit loss on accounts receivable, classified as current.

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