Business Combination (Acquisition Of Kabira Technologies, Inc.) (Details) (Kabira Technologies, Inc. [Member], USD $)	0 Months Ended	3 Months Ended
	Apr. 20, 2010	Feb. 28, 2011
Increase (decrease) in goodwill		$ 500,000
Acquisition related expenses	500,000
Cash	931,000
Accounts receivable (approximate contractual value)	2,942,000
Other assets	1,763,000
Identifiable intangible assets	10,680,000
Goodwill	2,548,000
Deferred income tax assets (liabilities), net	(78,000)
Liabilities	(14,916,000)
Total preliminary purchase price	3,870,000
Weighted average amortization period (in years)	4.0
Goodwill acquired deductible for income tax purposes	1,300,000
Existing Technology [Member]
Identifiable intangible assets	2,600,000
Weighted average amortization period (in years)	4.0
Customer Base [Member]
Identifiable intangible assets	1,700,000
Weighted average amortization period (in years)	4.0
Trademarks [Member]
Identifiable intangible assets	180,000
Weighted average amortization period (in years)	2.0
Maintenance Agreements [Member]
Identifiable intangible assets	$ 6,200,000
Weighted average amortization period (in years)	4.0