Note C - Shareholders' Equity - Option Transaction Summary (Details) - $ / shares |
12 Months Ended | |
|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2016 |
|
| Options, outstanding (in shares) | 54,800 | 297,384 |
| Weighted-average exercise price, outstanding (in dollars per share) | $ 3.13 | $ 5.29 |
| Cancelled or Forfeited (in shares) | ||
| Weighted-average exercise price, Cancelled or Forfeited (in dollars per share) | ||
| Exercised (in shares) | (15,850) | (242,584) |
| Weighted-average exercise price, Exercised (in dollars per share) | $ 3.97 | $ 5.78 |
| Exercised (in shares) | (15,850) | (242,584) |
| Weighted-average exercise price, Exercised (in dollars per share) | $ 3.97 | $ 5.78 |
| Options, outstanding (in shares) | 38,950 | 54,800 |
| Weighted-average exercise price, outstanding (in dollars per share) | $ 2.79 | $ 3.13 |
| X | ||||||||||
- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Weighted average price of options that were either forfeited or expired. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
|
| X | ||||||||||
- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|