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Condensed Consolidated Balance Sheets (Parentheticals) - USD ($)
shares in Thousands, $ in Thousands
Jan. 31, 2026
Apr. 30, 2025
Statement of Financial Position [Abstract]    
Accounts receivable, allowances $ 102 $ 110
Preferred stock, par value (in Dollars per share) $ 1 $ 1
Preferred stock - shares authorized (in Shares) 600 600
Preferred stock - shares issued (in Shares) 0 0
Common stock, par value (in Dollars per share) $ 1 $ 1
Common stock shares issued (in Shares) 9,896 9,717
Common stock - authorized shares (in Shares) 20,000 20,000
Common stock - shares outstanding (in Shares) 9,840 9,704
Common stock reacquired and held in treasury - shares (in Shares) 56 13