Note 4 - Accounts Receivable (Details) - Activity In Allowance For Doubtful Accounts (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Nov. 30, 2013	Nov. 24, 2012	Nov. 26, 2011
Activity In Allowance For Doubtful Accounts [Abstract]
Balance, beginning of the year	$ 1,789	$ 2,092
Additions charged to expense	361	376	13,490
Write-offs	(543)	(679)
Balance, end of the year	$ 1,607	$ 1,789	$ 2,092