Quarterly report pursuant to Section 13 or 15(d)

COMMON STOCK TRANSACTIONS (Details Narrative)

COMMON STOCK TRANSACTIONS (Details Narrative) - USD ($)	3 Months Ended		12 Months Ended
COMMON STOCK TRANSACTIONS (Details Narrative) - USD ($)	Jul. 31, 2021	Jul. 31, 2020	Apr. 30, 2020	Apr. 30, 2021
Shelf Offering [Member]
Class of Stock [Line Items]
Stock issued new, shares	0	156,000
Proceeds from sale of equity	$ 0	$ 1,900,000
Common Stock [Member] \| Stock based compensation - options \| Director Letter Agreement [Member]
Class of Stock [Line Items]
Stock issued for compensation, shares			1,333
Stock based compensation expense	$ 0	$ 7,356
Unvested shares	0			0
Common Stock [Member] \| Officers [Member] \| Compensation Agrmt 2020 [Member]
Class of Stock [Line Items]
Stock issued for compensation, shares		4,400
Stock based compensation expense	$ 0	$ 67,320
Unvested shares	0			1,833
Common Stock [Member] \| Officers [Member] \| Compensation Agrmt 2021 [Member]
Class of Stock [Line Items]
Stock issued for compensation, shares	4,400
Stock based compensation expense	$ 11,055
Unvested shares	1,833
Common Stock [Member] \| Nonemployee Members [Member] \| Director Letter Agreement [Member]
Class of Stock [Line Items]
Stock issued for compensation, shares		1,000
Stock based compensation expense	$ 3,371	$ 7,029
Unvested shares	0	0
Common Stock [Member] \| Four Consultants [Member] \| Consulting Agreements [Member]
Class of Stock [Line Items]
Stock issued for compensation, shares		667
Stock based compensation expense	$ 0	$ 4,199
Unvested shares	0			500
Common Stock [Member] \| A Consultant [Member] \| Medical And Scientific Advisory Board [Member]
Class of Stock [Line Items]
Stock issued for compensation, shares	333
Stock based compensation expense	$ 2,125	$ 0
Unvested shares	0
Common Stock [Member] \| Three Nonemployee Member [Member] \| Director Letter Agreement [Member]
Class of Stock [Line Items]
Stock issued for compensation, shares	1,002
Stock based compensation expense	$ 4,885
Unvested shares	0
Common Stock [Member] \| Two Consultants [Member] \| Consulting Agreements [Member]
Class of Stock [Line Items]
Stock issued for compensation, shares	334
Stock based compensation expense	$ 1,620
Unvested shares	251