Redeemable Preferred Stock - Additional Information (Detail) - Non-marketable preferred stock $ / shares in Units, $ in Millions	12 Months Ended
	May 31, 2023 USD ($) $ / shares
Temporary Equity [Line Items]
Redeemable preferred stock, par value (in dollars per share)	$ 1
Redeemable preferred stock, redeemable value (in dollars) | $	$ 0.3
Redeemable preferred stock, dividends payable annually per share (in dollars per share)	$ 0.10