Equity Incentive Plan - Summary of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
Apr. 30, 2025	Apr. 30, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Total share-based compensation expense	$ 24,271	$ 1,488
Research and Development
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Total share-based compensation expense	1,964	174
Selling, General and Administrative
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Total share-based compensation expense	$ 22,307	$ 1,314

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details