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Discontinued Operations (Details) $ in Thousands |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Feb. 22, 2019 USD ($) | Jun. 29, 2018 USD ($) | Dec. 31, 2021 USD ($) | Oct. 30, 2021 USD ($) contract | Oct. 31, 2020 USD ($) | Oct. 30, 2021 USD ($) contract | Oct. 31, 2020 USD ($) | Apr. 30, 2021 USD ($) | Apr. 30, 2020 USD ($) | Apr. 30, 2019 USD ($)
Other expense |  |  |  |  |  |  |  |  |  |
Discontinued operations |  |  |  |  |  |  |  |  |  |
Litigation reserve expense |  |  |  |  |  |  |  | $ 9,300 |  |
Discontinued Operations |  |  |  |  |  |  |  |  |  |
Discontinued operations |  |  |  |  |  |  |  |  |  |
Amount of alleged damages | $ 6,500 |  |  |  |  |  |  |  |  |
EES Business |  |  |  |  |  |  |  |  |  |
Discontinued operations |  |  |  |  |  |  |  |  |  |
Litigation reserve expense |  |  |  | $ 10,000 |  |  |  |  |  |
Amount of existing claims settled |  |  | $ 20,000 |  |  |  |  |  |  |
Payment period |  |  | 24 months |  |  |  |  |  |  |
EES Business | Disposed of by sale |  |  |  |  |  |  |  |  |  |
Discontinued operations |  |  |  |  |  |  |  |  |  |
Cash consideration received |  | $ 31,994 |  |  |  |  |  |  |  |
Gain on sale of business |  | $ 11,420 |  |  |  |  |  |  |  | $ (486)
Working capital dispute |  |  |  |  |  |  |  |  | $ 922 |
Amounts recorded in the consolidated financial statements |  |  |  |  |  |  |  |  | $ 341 |
EES Business | Disposed of by sale | Other income, net |  |  |  |  |  |  |  |  |  |
Discontinued operations |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  | 0 | $ 0 | $ 0 | $ 38 |  |  |
Holdback | Disposed of by sale |  |  |  |  |  |  |  |  |  |
Discontinued operations |  |  |  |  |  |  |  |  |  |
Cash consideration received |  |  |  | $ 6,500 |  | $ 6,500 |  |  |  |
Number of remaining contracts | contract |  |  |  | 2 |  | 2 |  |  |  |

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