Concentration of Risk - Summary of Customers Accounted for More than Five Percent of Net Sales (Parenthetical) (Detail)

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Concentration of Risk - Summary of Customers Accounted for More than Five Percent of Net Sales (Parenthetical) (Detail)	12 Months Ended
	Nov. 30, 2011
Concentration Risk [Line Items]
Customers accounted more than five percent of net sales	5.00%