Income Taxes (Summary Of Deferred Taxes) (Details) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2013	Nov. 30, 2012
Income Tax Disclosure [Abstract]
Accounts receivable	$ 739	$ 768
Other current assets	779	786
Capitalized research costs	0	231
Accrued compensation	3,901	4,657
Accrued liabilities and other	7,302	10,527
Deferred revenue	0	129
Stock-based compensation	4,222	8,122
Depreciation and amortization	6,724	5,533
Tax credit and loss carryforwards	34,460	39,216
Gross deferred tax assets	58,127	69,969
Valuation allowance	(12,949)	(14,316)
Total net deferred tax assets	45,178	55,653
Goodwill	(14,860)	(13,819)
Depreciation and amortization	(1,585)	0
Total deferred tax liabilities	(16,445)	(13,819)
Total	$ 28,733	$ 41,834