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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
Jan. 31, 2025
Apr. 30, 2024
Current Assets:    
Allowance for receivables $ 588 $ 588
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) 2,941,000 2,909,000
Common stock, shares outstanding (in shares) 2,872,000 2,839,000
Treasury stock, shares (in shares) 70,000 70,000