Quarterly report pursuant to Section 13 or 15(d)

COMMON STOCK TRANSACTIONS (Details Narrative)

COMMON STOCK TRANSACTIONS (Details Narrative) - USD ($)			1 Months Ended					3 Months Ended		9 Months Ended
COMMON STOCK TRANSACTIONS (Details Narrative) - USD ($)	Aug. 19, 2021	Aug. 09, 2021	Jan. 31, 2022	Jan. 31, 2021	Sep. 30, 2020	Apr. 30, 2020	Jan. 31, 2020	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Class of Stock [Line Items]
Proceeds from sale of equity	$ 70,000,000	$ 15,000,000
Exercise shares										2,500,000
Second S 3 Shelf Offering [Member]
Class of Stock [Line Items]
Stock issued new, shares											462,000
Proceeds from sale of equity											$ 4,700,000
Third S 3 Shelf Offering [Member]
Class of Stock [Line Items]
Stock issued new, shares											19,100,000
Proceeds from sale of equity											$ 87,400,000
Executive Officer [Member]
Class of Stock [Line Items]
Number of shares awarded			4,400
Common Stock [Member] \| Consulting Agreements [Member] \| Executive Officer [Member]
Class of Stock [Line Items]
Stock based compensation expense								$ 916		$ 916
Unvested shares			4,033					4,033		4,033
Common Stock [Member] \| Four Nonemployee Members [Member] \| Director Letter Agreement [Member]
Class of Stock [Line Items]
Stock issued for compensation, shares						1,333
Stock based compensation expense								$ 0	$ 0	$ 0	10,561
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	44,881	0	179,521
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								$ 7,370	$ 3,685	$ 29,480	$ 3,685
Unvested shares			0	4,033				0	4,033	0	4,033
Common Stock [Member] \| Nonemployee Members [Member] \| Director Letter Agreement [Member]
Class of Stock [Line Items]
Stock issued for compensation, shares											1,334
Stock based compensation expense								$ 0	$ 10,411	$ 4,342	$ 26,859
Unvested shares				0					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	$ 5,409	$ 0	$ 15,017
Unvested shares			0	167				0	167	0	167
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	$ 2,833	$ 3,542
Common Stock [Member] \| Three Nonemployee Member [Member] \| Director Letter Agreement [Member]
Class of Stock [Line Items]
Stock issued for compensation, shares										1,336
Stock based compensation expense								6,056		$ 16,792
Common Stock [Member] \| Two Consultants [Member] \| Consulting Agreements [Member]
Class of Stock [Line Items]
Stock issued for compensation, shares										334
Stock based compensation expense								$ 2,442	6,504	$ 2,442	6,504
Unvested shares			84					84		84
Common Stock [Member] \| Consultants [Member] \| Consulting Agreements [Member]
Class of Stock [Line Items]
Stock issued for compensation, shares										334
Stock based compensation expense								$ 265	$ 353	$ 265	$ 353