Discontinued Operations (Details) - USD ($)	3 Months Ended
Aug. 31, 2020	Aug. 31, 2019
Discontinued Operations and Disposal Groups [Abstract]
Net revenue	$ 0	$ 2,247,107
Cost of revenue	0	1,164,125
Gross profit	0	1,082,982
Operating expenses:
General, administration and sales	0	586,857
Research and development	0	9,081
Total operating expenses	0	595,938
Operating income	0	487,044
Other income (expense), net	0	(75,731)
Income before taxes	0	411,313
Provision for income taxes	0	35,351
Net income from discontinued operations	$ 0	$ 375,962

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Amount of costs of goods sold attributable to disposal group, including, but not limited to, discontinued operation.

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