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Assets and Liabilities Classified as Discontinued Operations (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Nov. 30, 2013
Jun. 01, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Document Period End Date Nov. 30, 2013  
Inventories $ 356 $ 303
Discontinued operations-Assets 356 303
Accrued liabilities-current 0 245
Discontinued operations-Liabilities $ 0 $ 245