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Stock-Based Compensation (Tables) | 3 Months Ended
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Jul. 31, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract] |
Stock-Based Compensation Expense Allocated | For the three-month periods ended July 31, 2021 and 2020, stock-based compensation expense was allocated as follows:
|  |  |  | Three Months Ended July 31,
(in thousands) |  |  |  |  |  | 2021 |  | 2020
Cost of sales and distribution |  |  |  |  |  | $ | 349 |  |  | $ | 299 |
Selling and marketing expenses |  |  |  |  |  | 319 |  |  | (21) |
General and administrative expenses |  |  |  |  |  | 509 |  |  | 683 |
Stock-based compensation expense |  |  |  |  |  | $ | 1,177 |  |  | $ | 961 |

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