2. Liquidity and Capital Resources (Details Narrative) - USD ($)	9 Months Ended	12 Months Ended
Feb. 28, 2019	Feb. 28, 2018	May 31, 2018	May 31, 2017
Cash raised through sale of preferred stock	$ 3,578,000	$ 5,933,050
Net cash used in operating activities	(8,398,744)	(5,164,107)
Cash and cash equivalents	2,287,965	$ 2,413,148	$ 1,390,258	$ 1,770,729
Series D-2017 Preferred Stock [Member]
Cash raised through sale of preferred stock	$ 3,578,000		$ 6,793,050

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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