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Reconciliation of Income Taxes Computed at the U.S. Federal Statutory Tax Rate to Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Components Of Deferred Income Tax Assets And Liabilities [Line Items]
Tax at U.S. statutory rate	$ (4,629)	$ 12,643	$ 15,806
Permanent differences	325	179	292
Global intangible low-taxed income (GILTI)	6,482	1,501	2,064
Foreign derived intangible income deduction (FDII)	(643)	(1,308)	(1,210)
Foreign rate differential	(3,742)	215	669
Subpart F income	152	397	628
Tax-effect from stock-based compensation	1,946	(462)	(2,651)
Provision for state income taxes, net of federal benefit	18	1,517	1,601
Non-deductible acquisition expenses	7,187
Tax credits	(6,709)	(2,527)	(3,298)
Impact of tax rate changes		583	(75)
Change in tax-related uncertainties	278	3	55
Changes in valuation allowances	355	85
Research expenditures deduction	(365)	(112)
Other	173	(814)	505
Income Tax Expense	$ 828	$ 11,900	$ 14,386

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