Revenue and Revenue Recognition (Details Narrative) - Canada and Mexico [Member] - USD ($)	9 Months Ended
Feb. 29, 2020	Feb. 28, 2019
Fiscal Year 2020 [Member]
Disaggregation of Revenue [Line Items]
Sales revenue	$ 2,187,000
Fiscal Year 2019 [Member]
Disaggregation of Revenue [Line Items]
Sales revenue		$ 291,000

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details