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Concentration of Risk (Tables) | 9 Months Ended
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Jan. 31, 2018
Risks and Uncertainties [Abstract] |
Summary Of Percentage Of Sales | The following table summarizes the percentage of sales to the Company's two largest customers for the nine months ended January 31, 2018 and 2017:
| PERCENT OF GROSS SALES
| Nine Months Ended
| January 31,
| 2018 |  | 2017
Customer A | 21.8 |  | 20.2
Customer B | 14.4 |  | 15.9

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