Note C - Shareholders' Equity - Options Currently Outstanding (Details) - USD ($) |
12 Months Ended | |||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Jun. 30, 2016 |
Sep. 30, 2014 |
|
| Number outstanding (in shares) | 54,800 | 297,384 | 373,051 | |
| Weighted average remaining contractual life | 2 years 302 days | 1 year 208 days | ||
| Weighted average exercise price (in dollars per share) | $ 3.13 | $ 5.29 | $ 5.29 | $ 4.93 |
| Aggregate intrinsic value | $ 858,771 | $ 2,420,521 | ||
| X | ||||||||||
- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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