Note 3 - Accounts Receivable (Details) - Activity in the Allowance for Doubtful Accounts (USD $) In Thousands, unless otherwise specified	6 Months Ended
	May 31, 2014
Activity in the Allowance for Doubtful Accounts [Abstract]
Balance at November 30, 2013	$ 1,607
Additions charged to expense	108
Write-offs and other deductions	(180)
Balance at May 31, 2014	$ 1,535