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Summary of Significant Accounting Policies (Details Narrative) - USD ($) | 3 Months Ended
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Jul. 31, 2020 | Jul. 31, 2019
Revenue remaining performance obligation | $ 800,000 |
Performance obligation revenue of next twelve months | $ 600,000 |
Revenue remaining performance obligation, percentage | 73.00% |
Antidilutive securities excluded from computation of earnings per share, shares | 5,564,404 | 5,008,145
Santander Bank [Member] | Letter 2 [Member] | August 2020 [Member] |  |
Letters of credit outstanding, amount | $ 322,734 |
Santander Bank [Member] | Letter 2 [Member] | September 2020 [Member] |  |
Letters of credit outstanding, amount | 64,547 |
Foreign Financial Institutions [Member] |  |
Cash | 300,000 |
Other Agreement [Member] | Santander Bank [Member] | Letter 1 [Member] |  |
Letters of credit outstanding, amount | $ 125,690 |
Line of credit expiration period | Feb. 28, 2021 |
Other Agreement [Member] | Santander Bank [Member] | Letter 2 [Member] |  |
Letters of credit outstanding, amount | $ 645,467 |

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