Consolidated Balance Sheets (Parentheticals) - $ / shares	Sep. 30, 2025	Sep. 30, 2024
Common stock, par value (in dollars per share)	$ 5	$ 5
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	10,338,308	10,249,899
Common stock, shares outstanding (in shares)	10,338,308	10,249,899
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0