Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2023
Operating Loss Carryforwards [Line Items]
Less valuation allowance	$ 550	$ 550
Unrecognized tax benefits	10,773	10,747	$ 10,957
Unrecognized tax benefits that would impact effective tax rate	8,510
Increase (decrease) in unrecognized tax benefits	26
Accrued interest and penalties	266	350
Increase (decrease) in tax expense	(84)	$ (36)
Decrease in unrecognized tax benefits is reasonable possible	2,500
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	236,448
Tax credit carryforward	$ 2,133

Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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