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Provision for (Benefit from) Income Taxes - Summary of Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Apr. 30, 2024 | Apr. 30, 2023
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Income Tax Disclosure [Abstract] |  |
Accrued liabilities | $ 1,269 | $ 273
Operating leases | 279 | 403
Depreciation and amortization | (318) | (297)
Stock-based compensation expense | 3,792 | 4,024
Capitalized research and development costs | 4,046 | 2,597
Net operating loss carry-forward | 9,038 | 9,756
Total deferred tax assets | 18,106 | 16,756
Less: Valuation allowance | (18,106) | (16,756)
Net deferred tax asset | $ 0 | $ 0

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