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Summary of Significant Accounting Policies (Details Narrative) - USD ($)	3 Months Ended
	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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