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Income Taxes - Summary of Significant Portions of Deferred Tax Assets and Liabilities (Details) - USD ($) | Jul. 31, 2024 | Apr. 30, 2024
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Deferred tax assets (liabilities): |  |
Net operating loss carryforwards | $ 11,658,241 | $ 11,378,409
Start-up costs | 808,647 | 833,918
Stock option and warrant payments | 705,662 | 694,206
Accumulated depreciation | 159,300 | (3,339)
Research and development credits | 255,600 | 255,600
Research and development warrants | 21,488 | 21,488
Total deferred tax assets, net | 13,608,938 | 13,180,282
Valuation Allowance | (13,608,938) | (13,180,282)
Net Deferred Tax Assets | $ 0 | $ 0

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