Business Combination (Acquisition Of Foresight Corporation) (Details) (Foresight Corporation [Member], USD $)	0 Months Ended	3 Months Ended
	Dec. 31, 2009	Nov. 30, 2010
Increase (decrease) in goodwill		$ (1,100,000)
Acquisition related expenses	800,000
Cash	821,000
Accounts receivable (approximate contractual value)	593,000
Current assets	92,000
Identifiable intangible assets	16,700,000
Goodwill	21,717,000
Liabilities	(3,191,000)
Deferred income tax assets (liabilities), net	(6,732,000)
Total preliminary purchase price	30,000,000
Weighted average amortization period (in years)	7.3
Goodwill acquired deductible for income tax purposes	0
Existing Technology [Member]
Identifiable intangible assets	9,800,000
Weighted average amortization period (in years)	7.3
Customer Base [Member]
Identifiable intangible assets	1,500,000
Weighted average amortization period (in years)	8.2
Trademarks [Member]
Identifiable intangible assets	600,000
Weighted average amortization period (in years)	8.0
Core Technology [Member]
Identifiable intangible assets	1,300,000
Weighted average amortization period (in years)	7.0
Maintenance Agreements [Member]
Identifiable intangible assets	2,400,000
Weighted average amortization period (in years)	8.0
Non-compete Agreements [Member]
Identifiable intangible assets	100,000
Weighted average amortization period (in years)	1.5
Subscription Base/Service Agreements [Member]
Identifiable intangible assets	$ 1,000,000
Weighted average amortization period (in years)	7.6