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Earnings per Share (Tables) | 12 Months Ended
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Sep. 30, 2022
Earnings Per Share [Abstract] |
Reconciliation of Weighted Average Common Shares Outstanding for Purposes of Calculating Basic and Diluted Earnings Per Share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended September 30,
​ |  | 2022 |  | 2021 |  | 2020
Loss from continuing operations | ​ | $ | (11,286) | ​ | $ | (28,869) | ​ | $ | (26,362)
Income from discontinued operations, net of tax | ​ |  | 2,144,145 | ​ |  | 139,616 | ​ |  | 91,215
Net income | ​ | ​ | 2,132,859 | ​ | ​ | 110,747 | ​ | ​ | 64,853
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average common shares outstanding used in computing basic earnings per share | ​ |  | 74,897 | ​ |  | 74,229 | ​ |  | 73,557
Dilutive restricted stock units | ​ |  | — | ​ |  | 226 | ​ |  | 293
Weighted average common shares outstanding used in computing diluted earnings per share | ​ |  | 74,897 | ​ |  | 74,455 | ​ |  | 73,850
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic net income per share: | ​ |  |  | ​ |  |  | ​ |  |
Loss from continuing operations | ​ | $ | (0.15) | ​ | $ | (0.39) | ​ | $ | (0.36)
Income from discontinued operations, net of tax | ​ |  | 28.63 | ​ |  | 1.88 | ​ |  | 1.24
Basic net income per share | ​ | $ | 28.48 | ​ | $ | 1.49 | ​ | $ | 0.88
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Diluted net income per share: | ​ |  |  | ​ |  |  | ​ |  |
Loss from continuing operations | ​ | $ | (0.15) | ​ | $ | (0.39) | ​ | $ | (0.36)
Income from discontinued operations, net of tax | ​ |  | 28.63 | ​ |  | 1.88 | ​ |  | 1.24
Diluted net income per share | ​ | $ | 28.48 | ​ | $ | 1.49 | ​ | $ | 0.88
​

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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