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Assets and Liabilities Classified as Discontinued Operations (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Aug. 31, 2013
Jun. 01, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Document Period End Date Aug. 31, 2013  
Inventories $ 338 $ 303
Discontinued operations-Assets 338 303
Accrued liabilities-current 541 245
Discontinued operations-Liabilities $ 541 $ 245