Income Taxes (Summary Of Deferred Taxes) (Details) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2012	Nov. 30, 2011
Income Tax Disclosure [Abstract]
Accounts receivable	$ 768	$ 1,230
Other current assets	786	780
Capitalized research costs	231	1,360
Accrued compensation	4,657	3,258
Accrued liabilities and other	10,527	9,018
Deferred revenue	129	1,540
Stock-based compensation	8,122	8,908
Depreciation and amortization	5,533	0
Tax credit and loss carryforwards	39,216	54,350
Gross deferred tax assets	69,969	80,444
Valuation allowance	(14,316)	(23,734)
Total net deferred tax assets	55,653	56,710
Goodwill	(13,819)	(10,629)
Depreciation and amortization	0	(3,795)
Total deferred tax liabilities	(13,819)	(14,424)
Total	$ 41,834	$ 42,286