Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Dec. 31, 2023	Sep. 30, 2023
Preferred stock, authorized (in shares)	1,000,000	1,000,000
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	20,000,000	20,000,000
Common stock, issued (in shares)	14,159,082	14,030,481
Common stock, outstanding (in shares)	13,317,090	13,188,489
Treasury stock, shares (in shares)	841,992	841,992