Organization and Nature of Business - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Apr. 30, 2025	Apr. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accumulated deficit	$ (762,694)	$ (653,170)	$ (469,726)
Cash, cash equivalents and marketable securities	$ 300,200

Amount of accumulated undistributed earnings (deficit).

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Name:	us-gaap_RetainedEarningsAccumulatedDeficit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant