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5. COMMON STOCK TRANSACTIONS (Details Narrative) - USD ($) | 12 Months Ended
--- | ---
Apr. 30, 2020 | Apr. 30, 2019 | Apr. 30, 2018
Shelf Offering [Member] |  |  |
Stock issued new, shares | 333,300,000 | 161,700,000 |
Proceeds from sale of equity | $ 2,100,000 | $ 2,300,000 |
Common Stock [Member] | Director Letter Agreement [Member] | Four Nonemployee Members [Member] |  |  |
Stock issued for compensation, shares | 2,000,000 |  |
Stock based compensation expense | $ 19,212 | 101,288 |
Unvested shares | 0 |  |
Common Stock [Member] | Director Letter Agreement [Member] | Four Nonemployee Member [Member] |  |  |
Stock issued for compensation, shares | 2,000,000 |  |
Stock based compensation expense | $ 65,339 |  |
Unvested shares | 0 |  |
Common Stock [Member] | Consulting Agreements [Member] | Three Consultants [Member] |  |  |
Stock issued for compensation, shares |  |  | 4,200,000
Stock based compensation expense | $ 0 | $ 73,800 |
Unvested shares | 0 | 0 |
Common Stock [Member] | Consulting Agreements [Member] | Five Consultants [Member] |  |  |
Stock issued for compensation, shares | 3,200,000 |  |
Stock based compensation expense | $ 108,575 | $ 17,350 |
Unvested shares | 200,000 |  |
Common Stock [Member] | 2018 Compensation Agreement [Member] | Officers [Member] |  |  |
Stock issued for compensation, shares |  |  | 6,600,000
Stock based compensation expense | $ 0 | $ 245,520 |
Unvested shares | 0 | 0 |
Common Stock [Member] | 2019 Compensation Agreement [Member] | Officers [Member] |  |  |
Stock issued for compensation, shares |  | 6,600,000 |
Stock based compensation expense | $ 278,891 | $ 47,809 |
Unvested shares | 0 | 4,400,000 |
Common Stock [Member] | 2019 Compensation Agreement [Member] | Four Consultants [Member] |  |  |
Stock issued for compensation, shares |  | 4,450,000 |
Stock based compensation expense | $ 24,726 | $ 230,829 |
Unvested shares | 0 | 408,333 |
Common Stock [Member] | Medical And Scientific Advisory Board [Member] | A Consultant [Member] |  |  |
Stock issued for compensation, shares | 2,500,000 |  |
Stock based compensation expense | $ 22,584 | $ 107,749 |
Unvested shares | 0 |  |
Common Stock [Member] | 2020 Compensation Agreement [Member] | Officers [Member] |  |  |
Stock issued for compensation, shares | 6,600,000 |  |
Stock based compensation expense | $ 89,759 |  |
Unvested shares | 4,400,000 |  |
Common Stock [Member] | Four Directors [Member] | Director Letter Agreement [Member] |  |  |
Stock issued for compensation, shares |  |  | 1,750,000
Stock based compensation expense | $ 0 | $ 24,165 |
Restricted Stock [Member] | Stock Subscription Agreements [Member] |  |  |
Stock issued new, shares | 103,000,000 |  |
Proceeds from sale of equity | $ 515,000 |  |

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