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Condensed Consolidated Balance Sheets (Parentheticals) - USD ($)
shares in Thousands, $ in Thousands
Oct. 31, 2023
Apr. 30, 2023
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 9,404 9,374
Common stock - authorized shares 20,000 20,000
Common stock - shares outstanding 9,403 9,373
Common stock reacquired and held in treasury - share 1 1