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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Apr. 30, 2024
Apr. 30, 2023
Statement of Financial Position [Abstract]    
Allowance for receivables $ 588 $ 476
Common stock, par value (in USD per share) $ 2.50 $ 2.50
Common stock, shares authorized (in shares) 5,000,000 5,000,000
Common stock, shares issued (in shares) 2,909,000 2,833,000
Common stock, shares outstanding (in shares) 2,839,000 2,830,000
Treasury stock, shares (in shares) 70,000 3,000