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Inventories (Tables) | 12 Months Ended
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Apr. 30, 2021
Inventory Disclosure [Abstract] |
Summary of Inventories | The following table sets forth a summary of inventories, net of reserves, stated at lower of cost or market, as of April 30, 2021 and 2020 (in thousands):
|  | April 30, 2021 |  |  | April 30, 2020 |
Finished goods |  | $ | 21,528 |  |  | $ | 60,400 |
Finished parts |  |  | 41,738 |  |  |  | 29,619 |
Work in process |  |  | 7,918 |  |  |  | 6,787 |
Raw material |  |  | 7,293 |  |  |  | 6,935 |
Total inventories |  | $ | 78,477 |  |  | $ | 103,741 |

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