Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
May 31, 2023	May 31, 2022
Income Taxes
Deferred income tax benefit	$ 0	$ 0
Effective Income Tax Rate Reconciliation Percent
Income tax provision at statutory rate:	21.00%	21.00%

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Name:	us-gaap_DeferredIncomeTaxExpenseBenefit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration