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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
Jul. 31, 2025
Apr. 30, 2025
Current Assets:    
Allowance for receivables $ 612 $ 530
Stockholders' Equity:    
Common stock, par value (in dollars per share) $ 2.50 $ 2.50
Common stock, shares authorized (in shares) 5,000,000 5,000,000
Common stock, shares issued (in shares) 2,968,000 2,941,000
Common stock, shares outstanding (in shares) 2,865,000 2,839,000
Treasury stock, shares (in shares) 103,000 103,000