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Significant Components of Deferred Income Tax Liabilities and Assets (Detail) - USD ($) $ in Thousands | May 31, 2021 | May 31, 2020
--- | --- | ---
Deferred income tax liabilities |  |
Indefinite and long-lived assets | $ (25,072) | $ (20,867)
Prepaid expenses | (721) | (795)
Deferred Tax Liabilities, Gross | (25,793) | (21,662)
Deferred income tax assets |  |
Stock options | 1,106 | 1,479
Inventories and accounts receivable | 2,081 | 1,336
Tax loss carryforwards | 662 | 484
Accrued expenses and other | 568 | 657
Less: valuation allowances | (541) | (419)
Deferred Tax Assets, Net of Valuation Allowance, Total | 3,876 | 3,537
Net deferred income tax liabilities | $ (21,917) | $ (18,125)

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