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Note C - Shareholders' Equity (Details) - Options Currently Outstanding (USD $)
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12 Months Ended | ||
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2011
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| Options Currently Outstanding [Abstract] | |||
| Number outstanding | 863,519 | 1,029,176 | 1,191,657 |
| Weighted average remaining contractual life | 4 years 32 days | 4 years 284 days | |
| Weighted average exercise price (in Dollars per share) | $ 3.24 | $ 3.07 | $ 2.74 |
| Aggregate intrinsic value (in Dollars) | $ 8,801,776 | $ 2,101,541 | |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- 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 | ||||||||||
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- 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 | ||||||||||
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- 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 | ||||||||||
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- 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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