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Earnings per Share | 6 Months Ended
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Mar. 31, 2023
Earnings Per Share [Abstract] |
Earnings per Share | 12. Earnings per Share The calculations of basic and diluted net income (loss) per share and basic and diluted weighted average shares outstanding are as follows for the three and six months ended March 31, 2023 and 2022 (in thousands, except per share data): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Six Months Ended | ​
​ | ​ | March 31, | ​ | March 31, | ​
​ |  | 2023 |  | 2022 |  | 2023 |  | 2022 |
Income (loss) from continuing operations | ​ | $ | (1,991) | ​ | $ | (1,816) | ​ | $ | (13,226) | ​ | $ | 1,041 | ​
Income (loss) from discontinued operations, net of tax | ​ |  | (2,936) | ​ |  | 2,121,690 | ​ |  | (2,936) | ​ |  | 2,162,152 | ​
Net income (loss) | ​ | $ | (4,927) | ​ | $ | 2,119,874 | ​ | $ | (16,162) | ​ | $ | 2,163,193 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average common shares outstanding used in computing basic income (loss) per share | ​ |  | 69,111 | ​ |  | 74,958 | ​ |  | 70,858 | ​ |  | 74,823 | ​
Dilutive restricted stock units | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 322 | ​
Weighted average common shares outstanding used in computing diluted income (loss) per share | ​ |  | 69,111 | ​ |  | 74,958 | ​ |  | 70,858 | ​ |  | 75,145 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic net income (loss) per share: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Income (loss) from continuing operations | ​ | $ | (0.03) | ​ | $ | (0.02) | ​ | $ | (0.19) | ​ | $ | 0.01 | ​
Income (loss) from discontinued operations, net of tax | ​ |  | (0.04) | ​ |  | 28.31 | ​ |  | (0.04) | ​ |  | 28.90 | ​
Basic net income (loss) per share | ​ | $ | (0.07) | ​ | $ | 28.28 | ​ | $ | (0.23) | ​ | $ | 28.91 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Diluted net income (loss) per share: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Income (loss) from continuing operations | ​ | $ | (0.03) | ​ | $ | (0.02) | ​ | $ | (0.19) | ​ | $ | 0.01 | ​
Income (loss) from discontinued operations, net of tax | ​ |  | (0.04) | ​ |  | 28.31 | ​ |  | (0.04) | ​ |  | 28.77 | ​
Diluted net income (loss) per share | ​ | $ | (0.07) | ​ | $ | 28.28 | ​ | $ | (0.23) | ​ | $ | 28.79 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ During the six months ended March 31, 2022, 59,513 restricted stock units were excluded from the computation of diluted loss per share as their effect would be antidilutive to earnings per share for continuing operations based on the treasury stock method.

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