Note C - Shareholders' Equity - Option Transaction Summary (Details) - $ / shares |
12 Months Ended | ||
|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2016 |
|
| Options, outstanding (in shares) | 38,950 | 54,800 | |
| Weighted-average exercise price, outstanding (in dollars per share) | $ 2.79 | $ 3.13 | |
| Granted (in shares) | 108,000 | 0 | 0 |
| Weighted-average exercise price, Granted (in dollars per share) | $ 13.37 | ||
| Cancelled or Forfeited (in shares) | |||
| Weighted-average exercise price, Cancelled or Forfeited (in dollars per share) | |||
| Exercised (in shares) | (8,450) | (15,850) | |
| Weighted-average exercise price, Exercised (in dollars per share) | $ 3.58 | $ 3.97 | |
| Weighted average fair value, granted (in dollars per share) | $ 4.78 | ||
| Options, outstanding (in shares) | 138,500 | 38,950 | 54,800 |
| Weighted-average exercise price, outstanding (in dollars per share) | $ 10.99 | $ 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://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Weighted average price of options that were either forfeited or expired. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. No definition available.
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| X | ||||||||||
- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
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| X | ||||||||||
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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| X | ||||||||||
- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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