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Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Apr. 30, 2024 | Apr. 30, 2023
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
Federal net operating loss carryforwards | $ 48,745 | $ 43,788
Foreign net operating loss carryforwards | 2,059 | 2,059
State operating loss carryforwards | 1,934 | 1,578
Federal and New Jersey research and development tax credits | 5,404 | 5,143
Stock compensation | 470 | 662
Accrued expenses | 312 | 474
Other | 2,578 | 1,977
Net deferred tax assets before valuation allowance | 61,502 | 55,681
Valuation allowance | (60,322) | (54,644)
Deferred tax assets | 1,180 | 1,037
Intangibles | 793 | 792
Lease liabilities | 590 | 448
Net deferred tax liabilities | $ (203) | $ (203)

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