Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Aug. 31, 2011	Nov. 30, 2010
Condensed Consolidated Balance Sheets
Accounts receivable, allowances	$ 6,065	$ 5,729
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	1,200,000	1,200,000
Common stock, shares issued	164,807	164,522
Common stock, shares outstanding	164,807	164,522