Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($)	Dec. 31, 2023	Sep. 30, 2023
Accounts receivable, allowance for doubtful accounts	$ 250,000	$ 250,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	5,000,000	5,000,000
Common stock, shares issued (in shares)	1,805,053	1,805,053
Treasury Stock, Common, Shares (in shares)	428,027	428,027
Treasury Stock, Common, Shares (in shares)	428,027	428,027