Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	Dec. 31, 2019	Sep. 30, 2019
Furniture and equipment, accumulated depreciation	$ 1,900,000	$ 1,900,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	5,000,000	5,000,000
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)	30,000,000	30,000,000
Common stock, issued (in shares)	13,459,708	13,459,708
Common stock, outstanding (in shares)	6,567,765	6,685,415
Treasury stock, shares (in shares)	6,891,943	6,891,943
Series A Junior Participating Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	30,000	30,000
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0