SHAREHOLDERS' EQUITY (Details) - USD ($)	3 Months Ended
Aug. 31, 2021	Aug. 31, 2020
SHAREHOLDERS' EQUITY (Details) [Line Items]
Proceeds from Issuance of Common Stock	$ 800,710
Share-based Payment Arrangement, Option [Member]
SHAREHOLDERS' EQUITY (Details) [Line Items]
Share-based Payment Arrangement, Expense	$ 319,622	$ 246,787
Common Stock [Member]
SHAREHOLDERS' EQUITY (Details) [Line Items]
Sale of Stock, Number of Shares Issued in Transaction (in Shares)	201,553
Sale of Stock, Consideration Received on Transaction	$ 838,332
Proceeds from Issuance of Common Stock	$ 800,710
Common Stock [Member] \| Minimum [Member]
SHAREHOLDERS' EQUITY (Details) [Line Items]
Sale of Stock, Price Per Share (in Dollars per share)	$ 4.02
Common Stock [Member] \| Maximum [Member]
SHAREHOLDERS' EQUITY (Details) [Line Items]
Sale of Stock, Price Per Share (in Dollars per share)	$ 4.47

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The cash inflow from the additional capital contribution to the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585

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- Definition

Cash received on stock transaction after deduction of issuance costs.

+ References

No definition available.

+ Details

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- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

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- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

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