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Net Income Per Share (Tables) | 6 Months Ended
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Mar. 31, 2023
Earnings Per Share [Abstract] |
Basic and Diluted Net Income Per Share | The following table presents shares used in the calculation of basic and diluted net income per share:
| Three Months Ended |  |  | Six Months Ended |
| March 31, |  |  | March 31, |
| 2022 |  |  | 2023 |  |  | 2022 |  |  | 2023 |
Weighted average common shares outstanding used in calculating basic net income per share |  | 21,861,438 |  |  |  | 21,853,557 |  |  |  | 21,880,558 |  |  |  | 21,804,326 |
Effect of dilutive options and non-vested restricted stock awards |  | 668,664 |  |  |  | 460,705 |  |  |  | 716,547 |  |  |  | 463,857 |
Weighted average common and common equivalent shares used in calculating diluted net income per share |  | 22,530,102 |  |  |  | 22,314,262 |  |  |  | 22,597,105 |  |  |  | 22,268,183 |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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