Sales to Customers Who Accounted for 10 Percent or More of Company's Net Revenues, Expressed as Percentage of Consolidated Net Revenue and Accounts Receivable for Each Customer (Parenthetical) (Detail) (BlackBerry termination [Member], USD $)	Aug. 31, 2013
BlackBerry termination [Member]
Revenue, Major Customer [Line Items]
Reserve for loss contingency	$ 0