Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	Aug. 31, 2025	May 31, 2025
Summary of Significant Accounting Policies
Accumulated deficit	$ (893,326)	$ (887,786)

Amount of accumulated undistributed earnings (deficit).

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