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Note C - Shareholders' Equity (Tables) | 12 Months Ended
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Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2012 |
Expected volatility |  |  | 82 | %
Expected life (in years) |  |  | 6 |
Expected dividends |  |  | 0 | %
Risk-free interest rate |  |  | .90 | %
Weighted-average grant-date fair value |  | $ | 4.12 |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Number of shares |  |  | Weighted average exercise price |  |  | Weighted average fair value |
Outstanding at September 30, 2012 |  |  | 1,029,176 |  |  | $ | 3.07 |  |  |  |
Granted |  |  | - |  |  |  | - |  |  |  | - |
Cancelled or Forfeited |  |  | (9,600 | ) |  |  | 5.77 |  |  |  |  |
Exercised |  |  | (156,057 | ) |  |  | 1.97 |  |  |  |  |
Outstanding at September 30, 2013 |  |  | 863,519 |  |  | $ | 3.24 |  |  |  |  |
Granted |  |  | - |  |  |  | - |  |  |  | - |
Cancelled or Forfeited |  |  | (2,450 | ) |  |  | 4.43 |  |  |  |  |
Exercised |  |  | (488,018 | ) |  |  | 1.94 |  |  |  |  |
Outstanding at September 30, 2014 |  |  | 373,051 |  |  | $ | 4.93 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable [Table Text Block] |
Year ended |  | Exercisable |  |  | Weighted average remaining contractual life (in years) |  | Weighted average exercise price |
September 30, 2014 |  |  | 313,851 |  |  | 2.63 |  | $ | 4.67 |
September 30, 2013 |  |  | 711,802 |  |  | 4.17 |  | $ | 2.75 |
Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding [Table Text Block] |
Year Ended |  | Number outstanding |  |  | Weighted average remaining contractual life (in years) |  | Weighted average exercise price |  |  | Aggregate intrinsic value |
September 30, 2014 |  |  | 373,051 |  |  | 2.52 |  | $ | 4.93 |  |  | $ | 2,908,849 |
September 30, 2013 |  |  | 863,519 |  |  | 4.09 |  | $ | 3.24 |  |  | $ | 8,801,776 |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
|  | Number of shares |  |  | Weighted average grant date fair value |
Unvested shares at September 30, 2012 |  |  | 363,336 |  |  | $ | 5.07 |
Granted |  |  | 9,090 |  |  |  | 5.50 |
Vested |  |  | (75,136 | ) |  |  | 4.95 |
Forfeited |  |  | (5,000 | ) |  |  | 5.10 |
Unvested shares at September 30, 2013 |  |  | 292,290 |  |  |  | 5.11 |
Granted |  |  | 307,615 |  |  |  | 13.39 |
Vested |  |  | (79,390 | ) |  |  | 5.15 |
Forfeited |  |  | (2,000 | ) |  |  | 5.10 |
Unvested shares at September 30, 2014 |  |  | 518,515 |  |  | $ | 10.02 |

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