Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended
Aug. 31, 2023	Aug. 31, 2022	May 31, 2023
Summary of Significant Accounting Policies
Net loss	$ (11,571)	$ (20,991)
Accumulated deficit	(853,261)		$ (841,690)
Restricted cash	$ 6,538		$ 6,507

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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