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Significant Components of Deferred Income Tax Liabilities and Assets (Detail) - USD ($) $ in Thousands | May 31, 2016 | May 31, 2015
--- | --- | ---
Deferred income tax liabilities |  |
Indefinite and long-lived assets | $ (19,296) | $ (15,906)
Prepaid expenses | (824) | (431)
Brazil valuation allowance | (542) | (542)
Deferred Tax Liabilities, Gross | (20,662) | (16,879)
Deferred income tax assets |  |
Stock options | 2,786 | 2,234
Inventories and accounts receivable | 2,076 | 1,809
Tax loss carryforwards | 813 | 542
Accrued expenses and other | 229 | 574
Deferred Tax Assets, Net of Valuation Allowance, Total | 5,904 | 5,159
Net deferred income tax liabilities | $ (14,758) | $ (11,720)

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