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Shareholders' Equity and Stock-Based Compensation (Tables) | 12 Months Ended
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Sep. 30, 2021
2009 Plan [Member] |
Summary of Option Activity under Stock-Based Compensation Plan | The following table summarizes option activity under the 2009 Plan:
|  | Number of Shares |  |  | Average Exercise Price Per Share |
Options outstanding at September 30, 2019 |  |  | 272,492 |  |  | $ | 6.126 |
Options exercised during fiscal 2020 |  |  | (20,000 | ) |  | $ | 5.126 |
Options outstanding at September 30, 2020 |  |  | 252,492 |  |  | $ | 6.205 |
Options exercised during fiscal 2021 |  |  | (51,508 | ) |  | $ | 5.126 |
Options expired on September 30, 2021 |  |  | (170,984 | ) |  | $ | 5.623 |
Options outstanding at September 30, 2021 |  |  | 30,000 |  |  | $ | 11.380 |

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