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v3.22.2.2

SHAREHOLDERS' EQUITY (Details) - COMMON STOCK ACTIVITY - USD ($) |  | 12 Months Ended |
--- | --- | --- | ---
Jan. 22, 2021 | May 31, 2022 | May 31, 2021 | May 21, 2021
SHAREHOLDERS' EQUITY (Details) - COMMON STOCK ACTIVITY [Line Items] |  |  |  |
Proceeds from Issuance of Common Stock |  | $ 2,401,734 | $ 1,177,394 |
Proceeds from Stock Options Exercised |  | $ 77,360 | $ 102,255 |
Common Stock [Member] |  |  |  |
SHAREHOLDERS' EQUITY (Details) - COMMON STOCK ACTIVITY [Line Items] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in Shares) |  | 39,500 | 86,750 |
Conversion of Stock, Shares Converted (in Shares) |  |  | 321,429 |
2020 Stock Incentive Plan [Member] |  |  |  |
SHAREHOLDERS' EQUITY (Details) - COMMON STOCK ACTIVITY [Line Items] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in Shares) |  |  |  | 900,000
Common Stock [Member] |  |  |  |
SHAREHOLDERS' EQUITY (Details) - COMMON STOCK ACTIVITY [Line Items] |  |  |  |
Sale of Stock, Consideration Received on Transaction |  | $ 2,402,000 | $ 1,177,000 |
Sale of Stock, Number of Shares Issued in Transaction (in Shares) |  | 521,267 | 158,889 |
Proceeds from Issuance of Common Stock |  | $ 2,317,000 | $ 1,011,000 |
Common Stock [Member] | Maximum [Member] |  |  |  |
SHAREHOLDERS' EQUITY (Details) - COMMON STOCK ACTIVITY [Line Items] |  |  |  |
Sale of Stock, Price Per Share (in Dollars per share) |  | $ 5.63 | $ 7.79 |
Common Stock [Member] | Maximum [Member] | ATM Agreement [Member] |  |  |  |
SHAREHOLDERS' EQUITY (Details) - COMMON STOCK ACTIVITY [Line Items] |  |  |  |
Sale of Stock, Consideration Received on Transaction | $ 15,000,000 |  |  |
Common Stock [Member] | Minimum [Member] |  |  |  |
SHAREHOLDERS' EQUITY (Details) - COMMON STOCK ACTIVITY [Line Items] |  |  |  |
Sale of Stock, Price Per Share (in Dollars per share) |  | $ 4.02 | $ 7.06 |
Convertible Preferred Stock [Member] | Common Stock [Member] |  |  |  |
SHAREHOLDERS' EQUITY (Details) - COMMON STOCK ACTIVITY [Line Items] |  |  |  |
Conversion of Stock, Shares Converted (in Shares) |  |  | 321,429 |
Share-Based Payment Arrangement, Option [Member] | Common Stock [Member] |  |  |  |
SHAREHOLDERS' EQUITY (Details) - COMMON STOCK ACTIVITY [Line Items] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in Shares) |  | 39,500 |  |
Proceeds from Stock Options Exercised |  | $ 77,000 |  |
Share-Based Payment Arrangement, Option [Member] | Common Stock [Member] | Maximum [Member] |  |  |  |
SHAREHOLDERS' EQUITY (Details) - COMMON STOCK ACTIVITY [Line Items] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in Dollars per share) |  | $ 3.62 |  |
Share-Based Payment Arrangement, Option [Member] | Common Stock [Member] | Minimum [Member] |  |  |  |
SHAREHOLDERS' EQUITY (Details) - COMMON STOCK ACTIVITY [Line Items] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in Dollars per share) |  | $ 1.2 |  |

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