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Condensed Consolidated Balance Sheets (Parentheticals) - USD ($)
shares in Thousands, $ in Thousands
Oct. 31, 2024
Apr. 30, 2024
Statement of Financial Position [Abstract]    
Accounts receivable, allowances (in Dollars) $ 110 $ 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 9,621 9,512
Common stock - authorized shares 20,000 20,000
Common stock - shares outstanding 9,604 9,511
Common stock reacquired and held in treasury - share 13 1