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Revenue Recognition (Tables) | 9 Months Ended
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Jan. 31, 2021
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | A summary of net sales transferred to customers over time and at a point in time for the periods ended January 31, 2021 and January 31, 2020 is as follows (in thousands):
| Three Months Ended January 31, 2021 |  | Three Months Ended January 31, 2020
| Domestic |  | International |  | Total |  | Domestic |  | International |  | Total
Over Time | $ | 24,198 |  |  | $ | 8,273 |  |  | $ | 32,471 |  |  | $ | 25,107 |  |  | $ | 7,526 |  |  | $ | 32,633 |
Point in Time | 868 |  |  | — |  |  | 868 |  |  | 1,592 |  |  | — |  |  | 1,592 |
| $ | 25,066 |  |  | $ | 8,273 |  |  | $ | 33,339 |  |  | $ | 26,699 |  |  | $ | 7,526 |  |  | $ | 34,225 |
| Nine Months Ended January 31, 2021 |  | Nine Months Ended January 31, 2020
| Domestic |  | International |  | Total |  | Domestic |  | International |  | Total
Over Time | $ | 81,206 |  |  | $ | 24,866 |  |  | $ | 106,072 |  |  | $ | 83,292 |  |  | $ | 25,713 |  |  | $ | 109,005 |
Point in Time | 2,690 |  |  | — |  |  | 2,690 |  |  | 4,278 |  |  | — |  |  | 4,278 |
| $ | 83,896 |  |  | $ | 24,866 |  |  | $ | 108,762 |  |  | $ | 87,570 |  |  | $ | 25,713 |  |  | $ | 113,283 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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- References No definition available. + Details
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