Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($)
|
Preferred Stock - Series F [Member] |
Preferred Stock - Series G [Member] |
Preferred Stock - Series H [Member] |
Preferred Stock - Series I [Member] |
Common Stock [Member] |
Common Stock to be issued [Member] |
Additional Paid-in Capital [Member] |
Accumulated Deficit [Member] |
Total |
Balance at Apr. 30, 2019 |
|
|
|
|
$ 1,986
|
|
$ 33,425,931
|
$ (26,275,102)
|
$ 7,152,815
|
Balance, shares at Apr. 30, 2019 |
|
|
|
|
1,986,063
|
|
|
|
|
Issuance of preferred stock and warrants for cash, net of offering cost |
$ 1
|
|
|
|
|
|
2,401,201
|
|
2,401,202
|
Issuance of preferred stock and warrants for cash, net of offering cost, shares |
1,250
|
|
|
|
|
|
|
|
|
Conversion of preferred stock into common stock |
|
|
|
|
$ 108
|
|
(108)
|
|
|
Conversion of preferred stock into common stock, shares |
(616)
|
|
|
|
108,071
|
|
|
|
|
Issuance of common stock for services |
|
|
|
|
$ 2
|
|
24,998
|
|
25,000
|
Issuance of common stock for services, shares |
|
|
|
|
2,153
|
|
|
|
|
Issuance of common stock for accrued services |
|
|
|
|
$ 1
|
|
12,499
|
|
12,500
|
Issuance of common stock for accrued services, shares |
|
|
|
|
1,068
|
|
|
|
|
Stock options granted for services |
|
|
|
|
|
|
52,214
|
|
52,214
|
Stock-based compensation in connection with restricted common stock unit grants |
|
|
|
|
|
|
52,682
|
|
52,682
|
Cancellation of common stock |
|
|
|
|
$ (9)
|
|
9
|
|
|
Cancellation of common stock, shares |
|
|
|
|
(8,500)
|
|
|
|
|
Net loss |
|
|
|
|
|
|
|
(1,308,599)
|
(1,308,599)
|
Balance at Jul. 31, 2019 |
$ 1
|
|
|
|
$ 2,088
|
|
35,969,426
|
(27,583,701)
|
8,387,814
|
Balance, shares at Jul. 31, 2019 |
634
|
|
|
|
2,088,855
|
|
|
|
|
Balance at Apr. 30, 2019 |
|
|
|
|
$ 1,986
|
|
33,425,931
|
(26,275,102)
|
7,152,815
|
Balance, shares at Apr. 30, 2019 |
|
|
|
|
1,986,063
|
|
|
|
|
Net loss |
|
|
|
|
|
|
|
|
(4,497,143)
|
Balance at Jan. 31, 2020 |
|
|
|
|
$ 2,963
|
|
38,934,916
|
(30,772,245)
|
8,165,634
|
Balance, shares at Jan. 31, 2020 |
270
|
|
|
|
2,963,547
|
|
|
|
|
Balance at Jul. 31, 2019 |
$ 1
|
|
|
|
$ 2,088
|
|
35,969,426
|
(27,583,701)
|
8,387,814
|
Balance, shares at Jul. 31, 2019 |
634
|
|
|
|
2,088,855
|
|
|
|
|
Conversion of preferred stock into common stock |
$ (1)
|
|
|
|
$ 64
|
|
(63)
|
|
|
Conversion of preferred stock into common stock, shares |
(364)
|
|
|
|
63,860
|
|
|
|
|
Issuance of common stock for services |
|
|
|
|
$ 200
|
|
2,019,800
|
|
2,020,000
|
Issuance of common stock for services, shares |
|
|
|
|
200,000
|
|
|
|
|
Stock options granted for services |
|
|
|
|
|
|
52,213
|
|
52,213
|
Stock-based compensation in connection with restricted common stock unit grants |
|
|
|
|
$ 34
|
|
393,064
|
|
393,098
|
Stock-based compensation in connection with restricted common stock unit grants, shares |
|
|
|
|
33,500
|
|
|
|
|
Net loss |
|
|
|
|
|
|
|
(2,227,086)
|
(2,227,086)
|
Balance at Oct. 31, 2019 |
|
|
|
|
$ 2,386
|
|
38,434,440
|
(29,810,787)
|
8,626,039
|
Balance, shares at Oct. 31, 2019 |
270
|
|
|
|
2,386,215
|
|
|
|
|
Issuance of common stock for services |
|
|
|
|
$ 503
|
|
418,195
|
|
418,698
|
Issuance of common stock for services, shares |
|
|
|
|
503,609
|
|
|
|
|
Issuance of common stock for accrued services |
|
|
|
|
$ 18
|
|
14,385
|
|
14,403
|
Issuance of common stock for accrued services, shares |
|
|
|
|
17,936
|
|
|
|
|
Stock options granted for services |
|
|
|
|
|
|
40,357
|
|
40,357
|
Stock-based compensation in connection with restricted common stock unit grants |
|
|
|
|
$ 56
|
|
27,539
|
|
27,595
|
Stock-based compensation in connection with restricted common stock unit grants, shares |
|
|
|
|
55,787
|
|
|
|
|
Net loss |
|
|
|
|
|
|
|
(961,458)
|
(961,458)
|
Balance at Jan. 31, 2020 |
|
|
|
|
$ 2,963
|
|
38,934,916
|
(30,772,245)
|
8,165,634
|
Balance, shares at Jan. 31, 2020 |
270
|
|
|
|
2,963,547
|
|
|
|
|
Balance at Apr. 30, 2020 |
|
|
|
|
$ 2,903
|
|
41,093,050
|
(31,587,952)
|
9,508,001
|
Balance, shares at Apr. 30, 2020 |
|
57
|
|
|
2,903,393
|
|
|
|
|
Conversion of preferred stock into common stock |
|
|
|
|
$ 21
|
|
(21)
|
|
|
Conversion of preferred stock into common stock, shares |
|
(57)
|
|
|
20,357
|
|
|
|
|
Stock options granted for services |
|
|
|
|
|
|
51,262
|
|
51,262
|
Stock-based compensation in connection with restricted common stock unit grants |
|
|
|
|
$ 2
|
|
20,216
|
|
20,218
|
Stock-based compensation in connection with restricted common stock unit grants, shares |
|
|
|
|
1,875
|
|
|
|
|
Net loss |
|
|
|
|
|
|
|
(957,120)
|
(957,120)
|
Balance at Jul. 31, 2020 |
|
|
|
|
$ 2,926
|
|
41,164,507
|
(32,545,072)
|
8,622,361
|
Balance, shares at Jul. 31, 2020 |
|
|
|
|
2,925,625
|
|
|
|
|
Balance at Apr. 30, 2020 |
|
|
|
|
$ 2,903
|
|
41,093,050
|
(31,587,952)
|
9,508,001
|
Balance, shares at Apr. 30, 2020 |
|
57
|
|
|
2,903,393
|
|
|
|
|
Net loss |
|
|
|
|
|
|
|
|
(9,502,366)
|
Balance at Jan. 31, 2021 |
|
|
|
|
$ 5,870
|
$ 794
|
71,816,386
|
(41,090,318)
|
30,732,732
|
Balance, shares at Jan. 31, 2021 |
|
|
|
|
5,869,751
|
794,136
|
|
|
|
Balance at Jul. 31, 2020 |
|
|
|
|
$ 2,926
|
|
41,164,507
|
(32,545,072)
|
8,622,361
|
Balance, shares at Jul. 31, 2020 |
|
|
|
|
2,925,625
|
|
|
|
|
Issuance of common stock for services |
|
|
|
|
$ 147
|
|
1,442,055
|
|
1,442,202
|
Issuance of common stock for services, shares |
|
|
|
|
147,341
|
|
|
|
|
Stock options granted for services |
|
|
|
|
|
|
137,650
|
|
137,650
|
Stock-based compensation in connection with restricted common stock unit grants |
|
|
|
|
|
|
77,250
|
|
77,250
|
Issuance of preferred stock and warrants, net of issuance cost |
|
|
|
$ 922
|
|
|
5,529,082
|
|
5,530,004
|
Issuance of preferred stock and warrants, net of issuance cost, shares |
|
|
|
921,666
|
|
|
|
|
|
Issuance of preferred stock and common stock in connection with the Share Exchange Agreement |
|
|
$ 107
|
|
$ 581
|
|
12,640,292
|
|
12,640,980
|
Issuance of preferred stock and common stock in connection with the Share Exchange Agreement, shares |
|
|
106,894
|
|
581,053
|
|
|
|
|
Issuance of common stock for exercise of warrants |
|
|
|
|
$ 10
|
|
69,990
|
|
70,000
|
Issuance of common stock for exercise of warrants, shares |
|
|
|
|
10,000
|
|
|
|
|
Net loss |
|
|
|
|
|
|
|
(4,844,666)
|
(4,844,666)
|
Balance at Oct. 31, 2020 |
|
|
$ 107
|
$ 922
|
$ 3,664
|
|
61,060,826
|
(37,389,738)
|
23,675,781
|
Balance, shares at Oct. 31, 2020 |
|
|
106,894
|
921,666
|
3,664,019
|
|
|
|
|
Conversion of preferred stock into common stock |
|
|
$ (107)
|
$ (922)
|
$ 1,991
|
|
(962)
|
|
|
Conversion of preferred stock into common stock, shares |
|
|
106,894
|
(921,666)
|
1,990,606
|
|
|
|
|
Issuance of common stock for services |
|
|
|
|
$ 8
|
|
1,590
|
|
1,598
|
Issuance of common stock for services, shares |
|
|
|
|
7,688
|
|
|
|
|
Stock options granted for services |
|
|
|
|
|
|
2,925
|
|
2,925
|
Stock-based compensation in connection with restricted common stock unit grants |
|
|
|
|
|
|
1,145,595
|
|
1,145,595
|
Issuance of common stock for exercise of warrants |
|
|
|
|
$ 202
|
|
1,179,794
|
|
1,179,996
|
Issuance of common stock for exercise of warrants, shares |
|
|
|
|
202,429
|
|
|
|
|
Common stock to be issued for cash |
|
|
|
|
|
$ 794
|
8,370,373
|
|
8,371,167
|
Common stock to be issued for cash,shares |
|
|
|
|
|
794,136
|
|
|
|
Issuance of common stock for prepaid services |
|
|
|
|
$ 5
|
|
56,245
|
|
56,250
|
Issuance of common stock for prepaid services,shares |
|
|
|
|
5,009
|
|
|
|
|
Net loss |
|
|
|
|
|
|
|
(3,700,580)
|
(3,700,580)
|
Balance at Jan. 31, 2021 |
|
|
|
|
$ 5,870
|
$ 794
|
$ 71,816,386
|
$ (41,090,318)
|
$ 30,732,732
|
Balance, shares at Jan. 31, 2021 |
|
|
|
|
5,869,751
|
794,136
|
|
|
|