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Note 2 – Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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Jul. 31, 2024
Accounting Policies [Abstract] |
[custom:RestatementsOfPreviouslyIssuedConsolidatedFinancialStatementsTableTextBlock] |
|  | Condensed Consolidated Statement of Operations For the three months ended July 31, 2023 |  |
|  | Originally Reported |  | As Restated |  | Change
Change in fair value of derivative liability |  | $ | (26,520 | ) |  | $ | — |  |  | $ | (26,520 | )
Net loss |  | $ | (5,810,348 | ) |  | $ | (5,836,868 | ) |  | $ | (26,520 | )
|  | Condensed Consolidated Statement of Shareholders’ Equity For the three months ended July 31, 2023 |  |
|  | Originally Reported |  | As Restated |  | Change
Additional paid-in capital |  | $ | 110,905,033 |  |  | $ | 113,554,659 |  |  | $ | 2,649,626 |
Accumulated deficit |  | $ | (60,397,141 | ) |  | $ | (62,914,971 | ) |  | $ | (2,517,830 | )
Total equity |  | $ | 49,993,398 |  |  | $ | 50,125,194 |  |  | $ | 131,796 |
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] |
|  | July 31, 2024 |  | April 30, 2024
Customer A |  |  | 38 | % |  |  | 53 | %
Customer B |  |  | 25 | % |  |  | 24 | %
[custom:RevenueRecognitionDisaggregatedRevenueByTypeTableTextBlock] |
|  | Three Months Ended July 31,
|  | 2024 |  | 2023
Contract related |  | $ | 886,440 |  |  | $ | 310,881 |
Product related |  |  | 1,890,095 |  |  |  | 1,437,248 |
Total |  | $ | 2,776,535 |  |  | $ | 1,748,129 |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] |
|  | July 31, 2024 |  | July 31, 2023
Series B Preferred Stock, as converted |  |  | 3,896 |  |  |  | 3,896 |
Stock options |  |  | 7,319,988 |  |  |  | 6,884,017 |
Warrants |  |  | 1,821,291 |  |  |  | 1,539,999 |
Restricted stock |  |  | 2,202,599 |  |  |  | 842,701 |
Total |  |  | 11,347,774 |  |  |  | 9,270,613 |

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