Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)

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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Mar. 31, 2023
Sep. 30, 2022
Statement Of Financial Position [Abstract]    
Preferred stock, par value per share (in dollars per share) $ 0 $ 0
Preferred stock, shares authorized (in shares) 1,000,000 1,000,000
Preferred stock, shares issued (in shares) 0 0
Common stock, par value per share (in dollars per share) $ 1.00 $ 1.00
Common stock, shares authorized (in shares) 15,000,000 15,000,000
Common stock, shares issued (in shares) 8,416,145 8,416,145
Common stock, shares outstanding (in shares) 7,599,492 7,586,995
Treasury stock at cost, shares (in shares) 816,653 829,150