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Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) | Series B Preferred Stock 1 [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | AOCI Attributable to Parent [Member] | Total
--- | --- | --- | --- | --- | --- | ---
Beginning balance, value at Apr. 30, 2022 | $ 9,867 | $ 53,749 | $ 106,821,384 | $ (27,499,056) | $ (1,470,272) | $ 77,915,672
Shares, Outstanding, Beginning Balance at Apr. 30, 2022 | 986,676 | 53,748,735 |  |  |  |
Stock based compensation |  |  | 755,471 |  |  | 755,471
Vesting of restricted stock units |  | $ 69 | (84,145) |  |  | (84,076)
[custom:VestingOfRestrictedStockUnitsShares] |  | 69,707 |  |  |  |
Unrealized gain on marketable securities |  |  |  |  | 133,582 | 133,582
Currency translation adjustments |  |  |  |  | 352 | 352
Net loss |  |  |  | (3,811,599) |  | (3,811,599)
Ending balance, value at Jul. 31, 2022 | $ 9,867 | $ 53,818 | 107,492,710 | (31,310,655) | (1,336,338) | 74,909,402
Shares, Outstanding, Ending Balance at Jul. 31, 2022 | 986,676 | 53,818,442 |  |  |  |
Beginning balance, value at Apr. 30, 2022 | $ 9,867 | $ 53,749 | 106,821,384 | (27,499,056) | (1,470,272) | 77,915,672
Shares, Outstanding, Beginning Balance at Apr. 30, 2022 | 986,676 | 53,748,735 |  |  |  |
Net loss |  |  |  |  |  | (15,722,078)
Public offering, net of $804,400 of issuance costs |  |  |  |  |  |
Ending balance, value at Jan. 31, 2023 | $ 9,867 | $ 54,385 | 109,191,895 | (43,221,134) | (1,142,046) | 64,892,967
Shares, Outstanding, Ending Balance at Jan. 31, 2023 | 986,676 | 54,385,461 |  |  |  |
Beginning balance, value at Jul. 31, 2022 | $ 9,867 | $ 53,818 | 107,492,710 | (31,310,655) | (1,336,338) | 74,909,402
Shares, Outstanding, Beginning Balance at Jul. 31, 2022 | 986,676 | 53,818,442 |  |  |  |
Stock based compensation |  |  | 1,246,796 |  |  | 1,246,796
Vesting of restricted stock units |  | $ 411 | (332,794) |  |  | (332,383)
[custom:VestingOfRestrictedStockUnitsShares] |  | 411,097 |  |  |  |
Unrealized gain on marketable securities |  |  |  |  | (350,811) | (350,811)
Currency translation adjustments |  |  |  |  | (1,256) | (1,256)
Net loss |  |  |  | (6,244,477) |  | (6,244,477)
Ending balance, value at Oct. 31, 2022 | $ 9,867 | $ 54,229 | 108,406,712 | (37,555,132) | (1,688,405) | 69,227,271
Shares, Outstanding, Ending Balance at Oct. 31, 2022 | 986,676 | 54,229,539 |  |  |  |
Stock based compensation |  |  | 788,691 |  |  | 788,691
Vesting of restricted stock units |  | $ 156 | (3,508) |  |  | (3,352)
[custom:VestingOfRestrictedStockUnitsShares] |  | 155,922 |  |  |  |
Unrealized gain on marketable securities |  |  |  |  | 545,235 | 545,235
Currency translation adjustments |  |  |  |  | 1,124 | 1,124
Net loss |  |  |  | (5,666,002) |  | (5,666,002)
Ending balance, value at Jan. 31, 2023 | $ 9,867 | $ 54,385 | 109,191,895 | (43,221,134) | (1,142,046) | 64,892,967
Shares, Outstanding, Ending Balance at Jan. 31, 2023 | 986,676 | 54,385,461 |  |  |  |
Beginning balance, value at Apr. 30, 2023 | $ 9,867 | $ 54,568 | 109,993,100 | (54,586,793) | (861,117) | 54,609,625
Shares, Outstanding, Beginning Balance at Apr. 30, 2023 | 986,676 | 54,568,065 |  |  |  |
Stock based compensation |  |  | 911,606 |  |  | 911,606
Vesting of restricted stock units |  | $ 155 | (8,675) |  |  | (8,520)
[custom:VestingOfRestrictedStockUnitsShares] |  | 155,476 |  |  |  |
Unrealized gain on marketable securities |  |  |  |  | 289,389 | 289,389
Currency translation adjustments |  |  |  |  | 1,646 | 1,646
Net loss |  |  |  | (5,810,348) |  | (5,810,348)
Conversion of preferred stock | $ (9,820) | $ 818 | 9,002 |  |  |
Stock Issued During Period, Shares, Conversion of Convertible Securities | (982,000) | (818,334) |  |  |  |
Stock Issued During Period, Shares, Conversion of Convertible Securities | 982,000 | 818,334 |  |  |  |
Ending balance, value at Jul. 31, 2023 | $ 47 | $ 55,541 | 110,905,033 | (60,397,141) | (570,082) | 49,993,398
Shares, Outstanding, Ending Balance at Jul. 31, 2023 | 4,676 | 55,541,875 |  |  |  |
Beginning balance, value at Apr. 30, 2023 | $ 9,867 | $ 54,568 | 109,993,100 | (54,586,793) | (861,117) | 54,609,625
Shares, Outstanding, Beginning Balance at Apr. 30, 2023 | 986,676 | 54,568,065 |  |  |  |
Net loss |  |  |  |  |  | (16,980,214)
[custom:IssuanceOfCommonStockThroughATMFacilitiesNetShares] |  | 53,235 |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period |  | 3,000 |  |  |  |
Public offering, net of $804,400 of issuance costs |  |  |  |  |  | 8,395,600
[custom:StockIssuedDuringPeriodSharesPublicOffering] |  | 18,400,000 |  |  |  |
Ending balance, value at Jan. 31, 2024 | $ 47 | $ 74,171 | 121,060,881 | (71,567,007) | 4,621 | 49,572,713
Shares, Outstanding, Ending Balance at Jan. 31, 2024 | 4,676 | 74,171,106 |  |  |  |
Beginning balance, value at Jul. 31, 2023 | $ 47 | $ 55,541 | 110,905,033 | (60,397,141) | (570,082) | 49,993,398
Shares, Outstanding, Beginning Balance at Jul. 31, 2023 | 4,676 | 55,541,875 |  |  |  |
Stock based compensation |  |  | 1,196,325 |  |  | 1,196,325
Vesting of restricted stock units |  | $ 55 | (7,826) |  |  | (7,771)
[custom:VestingOfRestrictedStockUnitsShares] |  | 54,786 |  |  |  |
Unrealized gain on marketable securities |  |  |  |  | 363,663 | 363,663
Currency translation adjustments |  |  |  |  | 1,376 | 1,376
Net loss |  |  |  | (5,681,328) |  | (5,681,328)
Issuance of common stock through ATM facility, net |  | $ 53 | 9,159 |  |  | 9,212
[custom:IssuanceOfCommonStockThroughATMFacilitiesNetShares] |  | 53,235 |  |  |  |
Ending balance, value at Oct. 31, 2023 | $ 47 | $ 55,649 | 112,102,691 | (66,078,469) | (205,043) | 45,874,875
Shares, Outstanding, Ending Balance at Oct. 31, 2023 | 4,676 | 55,649,896 |  |  |  |
Stock based compensation |  |  | 585,771 |  |  | 585,771
Vesting of restricted stock units |  | $ 119 | (7,433) |  |  | (7,314)
[custom:VestingOfRestrictedStockUnitsShares] |  | 118,210 |  |  |  |
Unrealized gain on marketable securities |  |  |  |  | 211,113 | 211,113
Currency translation adjustments |  |  |  |  | (1,449) | (1,449)
Net loss |  |  |  | (5,488,538) |  | (5,488,538)
Exercise of stock options |  | $ 3 | 2,652 |  |  | 2,655
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period |  | 3,000 |  |  |  |
Public offering, net of $804,400 of issuance costs |  | $ 18,400 | 8,377,200 |  |  | 8,395,600
[custom:StockIssuedDuringPeriodSharesPublicOffering] |  | 18,400,000 |  |  |  |
Ending balance, value at Jan. 31, 2024 | $ 47 | $ 74,171 | $ 121,060,881 | $ (71,567,007) | $ 4,621 | $ 49,572,713
Shares, Outstanding, Ending Balance at Jan. 31, 2024 | 4,676 | 74,171,106 |  |  |  |

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