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INTANGIBLE ASSETS, NET | 12 Months Ended
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May 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets Disclosure [Text Block] | 3. INTANGIBLE ASSETS, NET Intangible assets, net of accumulated amortization, consist of the following at May 31:
|  | 2020 |  | 2019
Licenses |  | $ | 551,397 |  | $ | 510,600
Patents |  |  | 113,382 |  |  | 68,860
Less accumulated amortization- licenses |  |  | (487,989) |  |  | (471,530)
Less accumulated amortization- patents |  |  | (8,135) |  |  | (721)
Intangible assets, net |  | $ | 168,655 |  | $ | 107,209
Expected amortization of intangible assets for the years ending May 31:
2021 |  | $ | 18,112
2022 |  |  | 8,503
2023 |  |  | 6,211
2024 |  |  | 6,136
2025 |  |  | 5,219
Thereafter |  |  | 124,474
Total |  | $ | 168,655

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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