Income Taxes - Effective Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Income Tax Disclosure [Abstract]
Expected benefit at federal statutory rate	$ (56,314)	$ (40,119)	$ (11,628)
State tax expense—net of federal benefit	306	310	286
Impact of foreign operations	(75)	770	(299)
Federal research and development credit	(2,489)	(1,109)	(694)
Change in valuation allowance	32,481	59,450	30,587
Stock-based compensation	25,806	(19,152)	(17,667)
Meals and entertainment	95	50	35
Other permanent items	865	589	84
Provision for income taxes	$ 675	$ 789	$ 704

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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