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Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) shares in Thousands, $ in Thousands	Jul. 31, 2025	Apr. 30, 2025
Statement of Financial Position [Abstract]
Accounts receivable, allowances (in Dollars)	$ 102	$ 110
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	9,784	9,717
Common stock - authorized shares	20,000	20,000
Common stock - shares outstanding	9,749	9,704
Common stock reacquired and held in treasury - share	35	13

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

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Face amount or stated value per share of common stock.

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Number of previously issued common shares repurchased by the issuing entity and held in treasury.

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