Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail)	12 Months Ended
	May 31, 2022 USD ($)
Income Tax Disclosure [Abstract]
Beginning Balance	$ 3,836,000
Decreases - tax positions taken in prior years	(513,000)
Increases - current tax positions	1,436,000
Lapse of statutes of limitations	(53,000)
Ending Balance	$ 4,706,000