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INTANGIBLE ASSETS, NET (Tables) | 12 Months Ended
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May 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | 2021 |  | 2020
Licenses |  | $ | 182,176 |  | $ | 551,397
Patents |  |  | 239,423 |  |  | 113,382
Less accumulated amortization-licenses |  |  | (107,194) |  |  | (487,989)
Less accumulated amortization-patents |  |  | (19,575) |  |  | (8,135)
Intangible asssets, net |  | $ | 294,830 |  | $ | 168,655
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
2022 |  | $ | 21,846
2023 |  |  | 20,058
2024 |  |  | 20,058
2025 |  |  | 19,071
2026 |  |  | 18,975
Thereafter |  |  | 194,822
Total |  | $ | 294,830

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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