Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) |
Mar. 31, 2020 |
Sep. 30, 2019 |
|---|---|---|
| Furniture and equipment, accumulated depreciation | $ 2,000,000 | $ 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 | 6,567,765 |
| 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 |