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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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May 31, 2022
Accounting Policies [Abstract] |
Schedule of Inventory, Current [Table Text Block] |
| May 31,
| 2022 |  | 2021
Raw materials | $ | 1,717,000 |  | $ | 1,812,000
Work in progress |  | 763,000 |  |  | 1,687,000
Finished products |  | 782,000 |  |  | 1,324,000
Total gross inventory | $ | 3,262,000 |  | $ | 4,823,000
Inventory reserve |  | (846,000) |  |  | (1,617,000)
Net inventory | $ | 2,416,000 |  | $ | 3,206,000
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  |  | For the year ended May 31,
|  |  | 2022 |  |  | 2021
Dividend yield |  |  | 0% |  |  | 0%
Expected volatility |  |  | 102.54 - 105.48% |  |  | 71.19 - 107.53%
Risk free interest rate |  |  | 0.97-2.75% |  |  | 0.34-1.18%
Expected term |  |  | 5.50-6.25 Years |  |  | 5.50-6.25 Years
Disaggregation of Revenue [Table Text Block] |
|  | For the year ended May 31,
|  | 2022 |  | 2021
Physician's office |  | $ | 14,259,000 |  | $ | 2,801,000
Clinical lab |  |  | 3,064,000 |  |  | 3,077,000
Over-the-counter |  |  | 1,089,000 |  |  | 766,000
Contract manufacturing |  |  | 459,000 |  |  | 555,000
Total |  | $ | 18,871,000 |  | $ | 7,199,000

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