CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
|
Total |
Common Stock |
Additional Paid-In Capital |
Treasury Stock |
Accumulated Deficit |
Beginning balance at Apr. 30, 2019 |
$ 26,461,428
|
$ 18,666
|
$ 68,562,727
|
$ (70,000)
|
$ (42,049,965)
|
Beginning balance (in shares) at Apr. 30, 2019 |
Ìý
|
18,665,551
|
Ìý
|
Ìý
|
Ìý
|
Increase (Decrease) in Stockholders' Equity [Roll Forward] |
Ìý
|
Ìý
|
Ìý
|
Ìý
|
Ìý
|
Stock-based compensation |
1,627,304
|
Ìý
|
1,627,304
|
Ìý
|
Ìý
|
Common stock issued for cashless stock options exercised |
0
|
$ 191
|
(191)
|
Ìý
|
Ìý
|
Common stock issued for cashless stock options exercised (in shares) |
Ìý
|
190,559
|
Ìý
|
Ìý
|
Ìý
|
Common stock issued for stock options exercised for cash |
768,381
|
$ 234
|
768,147
|
Ìý
|
Ìý
|
Common stock issued for stock options exercised for cash (in shares) |
Ìý
|
234,233
|
Ìý
|
Ìý
|
Ìý
|
Common stock issued for cashless warrant exercise |
0
|
$ 77
|
(77)
|
Ìý
|
Ìý
|
Common stock issued for cashless warrant exercise (in shares) |
Ìý
|
76,929
|
Ìý
|
Ìý
|
Ìý
|
Amortization of warrant based cost |
27,690
|
Ìý
|
27,690
|
Ìý
|
Ìý
|
Amortization of restricted stock issued for services |
97,748
|
Ìý
|
97,748
|
Ìý
|
Ìý
|
Restricted stock issued for services, subject to vesting |
0
|
$ 144
|
(144)
|
Ìý
|
Ìý
|
Restricted Stock Issued for Services, subject to vesting (in shares) |
Ìý
|
144,803
|
Ìý
|
Ìý
|
Ìý
|
Common stock issued for equity raise, net of underwriter costs |
16,044,879
|
$ 2,415
|
16,042,464
|
Ìý
|
Ìý
|
Common stock issued in equity raise, net of underwriter costs (in shares) |
Ìý
|
2,415,000
|
Ìý
|
Ìý
|
Ìý
|
Other offerings costs |
(51,282)
|
Ìý
|
(51,282)
|
Ìý
|
Ìý
|
Beneficial conversion feature on convertible debt |
1,692,309
|
Ìý
|
1,692,309
|
Ìý
|
Ìý
|
Common stock short swing reclamation |
5,433
|
Ìý
|
5,433
|
Ìý
|
Ìý
|
Net loss |
(4,994,502)
|
Ìý
|
Ìý
|
Ìý
|
(4,994,502)
|
Ending balance at Jan. 31, 2020 |
41,679,388
|
$ 21,727
|
88,772,128
|
(70,000)
|
(47,044,467)
|
Ending balance (in shares) at Jan. 31, 2020 |
Ìý
|
21,727,075
|
Ìý
|
Ìý
|
Ìý
|
Beginning balance at Oct. 31, 2019 |
24,967,090
|
$ 19,142
|
69,781,363
|
(70,000)
|
(44,763,415)
|
Beginning balance (in shares) at Oct. 31, 2019 |
Ìý
|
19,142,316
|
Ìý
|
Ìý
|
Ìý
|
Increase (Decrease) in Stockholders' Equity [Roll Forward] |
Ìý
|
Ìý
|
Ìý
|
Ìý
|
Ìý
|
Stock-based compensation |
737,820
|
Ìý
|
737,820
|
Ìý
|
Ìý
|
Common stock issued for cashless stock options exercised |
0
|
$ 9
|
(9)
|
Ìý
|
Ìý
|
Common stock issued for cashless stock options exercised (in shares) |
Ìý
|
8,352
|
Ìý
|
Ìý
|
Ìý
|
Common stock issued for stock options exercised for cash |
530,668
|
$ 121
|
530,547
|
Ìý
|
Ìý
|
Common stock issued for stock options exercised for cash (in shares) |
Ìý
|
121,407
|
Ìý
|
Ìý
|
Ìý
|
Amortization of warrant based cost |
9,125
|
Ìý
|
9,125
|
Ìý
|
Ìý
|
Amortization of restricted stock issued for services |
24,398
|
Ìý
|
24,398
|
Ìý
|
Ìý
|
Restricted stock issued for services, subject to vesting |
0
|
$ 40
|
(40)
|
Ìý
|
Ìý
|
Restricted Stock Issued for Services, subject to vesting (in shares) |
Ìý
|
40,000
|
Ìý
|
Ìý
|
Ìý
|
Common stock issued for equity raise, net of underwriter costs |
16,044,879
|
$ 2,415
|
16,042,464
|
Ìý
|
Ìý
|
Common stock issued in equity raise, net of underwriter costs (in shares) |
Ìý
|
2,415,000
|
Ìý
|
Ìý
|
Ìý
|
Other offerings costs |
(51,282)
|
Ìý
|
(51,282)
|
Ìý
|
Ìý
|
Beneficial conversion feature on convertible debt |
1,692,309
|
Ìý
|
1,692,309
|
Ìý
|
Ìý
|
Common stock short swing reclamation |
5,433
|
Ìý
|
5,433
|
Ìý
|
Ìý
|
Net loss |
(2,281,052)
|
Ìý
|
Ìý
|
Ìý
|
(2,281,052)
|
Ending balance at Jan. 31, 2020 |
41,679,388
|
$ 21,727
|
88,772,128
|
(70,000)
|
(47,044,467)
|
Ending balance (in shares) at Jan. 31, 2020 |
Ìý
|
21,727,075
|
Ìý
|
Ìý
|
Ìý
|
Beginning balance at Apr. 30, 2020 |
41,747,957
|
$ 21,771
|
89,505,216
|
(70,000)
|
(47,709,030)
|
Beginning balance (in shares) at Apr. 30, 2020 |
Ìý
|
21,770,520
|
Ìý
|
Ìý
|
Ìý
|
Increase (Decrease) in Stockholders' Equity [Roll Forward] |
Ìý
|
Ìý
|
Ìý
|
Ìý
|
Ìý
|
Stock-based compensation |
3,019,828
|
Ìý
|
3,019,828
|
Ìý
|
Ìý
|
Common stock issued for cashless stock options exercised |
0
|
$ 22
|
(22)
|
Ìý
|
Ìý
|
Common stock issued for cashless stock options exercised (in shares) |
Ìý
|
22,339
|
Ìý
|
Ìý
|
Ìý
|
Common stock issued for conversion of Convertible Notes |
10,000,000
|
$ 1,399
|
9,998,601
|
Ìý
|
Ìý
|
Common stock issued for conversion of Convertible Notes (in shares) |
Ìý
|
1,398,602
|
Ìý
|
Ìý
|
Ìý
|
Common stock issued for stock options exercised for cash |
2,578,700
|
$ 1,365
|
4,394,749
|
(1,817,414)
|
Ìý
|
Common stock issued for stock options exercised for cash (in shares) |
Ìý
|
1,364,721
|
Ìý
|
Ìý
|
Ìý
|
Common stock issued for vested restricted stock units |
0
|
$ 206
|
(206)
|
Ìý
|
Ìý
|
Common stock issued for vested restricted stock units (in shares) |
Ìý
|
206,109
|
Ìý
|
Ìý
|
Ìý
|
Common stock issued for warrants exercised for cash |
1,081,792
|
$ 192
|
1,081,600
|
Ìý
|
Ìý
|
Common stock issued for warrants exercised for cash (in shares) |
Ìý
|
192,049
|
Ìý
|
Ìý
|
Ìý
|
Common stock issued for services |
19,900
|
$ 2
|
19,898
|
Ìý
|
Ìý
|
Common stock issued for services (in shares) |
Ìý
|
2,000
|
Ìý
|
Ìý
|
Ìý
|
Modification charge for warrants exercised |
25,966
|
Ìý
|
25,966
|
Ìý
|
Ìý
|
Amortization of warrant based cost |
27,375
|
Ìý
|
27,375
|
Ìý
|
Ìý
|
Cancellation of treasury stock |
0
|
$ (17)
|
(69,983)
|
70,000
|
Ìý
|
Cancellation of Treasury Stock (in shares) |
Ìý
|
(16,667)
|
Ìý
|
Ìý
|
Ìý
|
Net loss |
(8,128,987)
|
Ìý
|
Ìý
|
Ìý
|
(8,128,987)
|
Ending balance at Jan. 31, 2021 |
50,372,531
|
$ 24,940
|
108,003,022
|
(1,817,414)
|
(55,838,017)
|
Ending balance (in shares) at Jan. 31, 2021 |
Ìý
|
24,939,673
|
Ìý
|
Ìý
|
Ìý
|
Beginning balance at Oct. 31, 2020 |
52,094,217
|
$ 24,417
|
105,092,551
|
0
|
(53,022,751)
|
Beginning balance (in shares) at Oct. 31, 2020 |
Ìý
|
24,416,539
|
Ìý
|
Ìý
|
Ìý
|
Increase (Decrease) in Stockholders' Equity [Roll Forward] |
Ìý
|
Ìý
|
Ìý
|
Ìý
|
Ìý
|
Stock-based compensation |
701,170
|
Ìý
|
701,170
|
Ìý
|
Ìý
|
Common stock issued for stock options exercised for cash |
363,385
|
$ 447
|
2,180,352
|
(1,817,414)
|
Ìý
|
Common stock issued for stock options exercised for cash (in shares) |
Ìý
|
447,134
|
Ìý
|
Ìý
|
Ìý
|
Common stock issued for vested restricted stock units |
0
|
$ 74
|
(74)
|
Ìý
|
Ìý
|
Common stock issued for vested restricted stock units (in shares) |
Ìý
|
74,000
|
Ìý
|
Ìý
|
Ìý
|
Common stock issued for services |
19,900
|
$ 2
|
19,898
|
Ìý
|
Ìý
|
Common stock issued for services (in shares) |
Ìý
|
2,000
|
Ìý
|
Ìý
|
Ìý
|
Amortization of warrant based cost |
9,125
|
Ìý
|
9,125
|
Ìý
|
Ìý
|
Net loss |
(2,815,266)
|
Ìý
|
Ìý
|
Ìý
|
(2,815,266)
|
Ending balance at Jan. 31, 2021 |
$ 50,372,531
|
$ 24,940
|
$ 108,003,022
|
$ (1,817,414)
|
$ (55,838,017)
|
Ending balance (in shares) at Jan. 31, 2021 |
Ìý
|
24,939,673
|
Ìý
|
Ìý
|
Ìý
|