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Note 4 - Accounts Receivable (Detail) - Activity in the allowance for doubtful accounts (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Aug. 25, 2012	Aug. 27, 2011	Aug. 25, 2012	Aug. 27, 2011
Balance at November 26, 2011			$ 2,092
Additions charged to expense	161	90	416	13,116
Write-offs and other deductions			(266)
Balance at August 25, 2012	2,243		2,243
Additions Charged to Expense [Member]
Additions charged to expense			$ 417

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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