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Note 3 - Discontinued Operations And Exit Activities (Detail) (USD $)	12 Months Ended				3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Sep. 30, 2010 Network Secrurity Group [Member]	Dec. 31, 2010 Network Secrurity Group [Member]	Dec. 31, 2012 Loss On Asset Write Off [Member]	Dec. 31, 2012 One Time Employee Termination Benefits [Member]	Dec. 31, 2012 Property and Equipment [Member]	Dec. 31, 2012 Intangible Assets [Member]	Dec. 31, 2012 Deferred Charges [Member]	Dec. 31, 2012 Accrued One Time Termination Benefits [Member]
Asset Impairment Charges	$ 2,320,000		$ 422,000	$ 2,184,000	$ 2,184,000
Disposal Group, Including Discontinued Operation, Operating Expense						1,218,000
Business Exit Costs		$ 3,343,000					$ 2,320,000	$ 1,023,000	$ 462,000	$ 1,198,000	$ 660,000	$ 1,023,000

The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

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- Definition

The charge against earnings in the period, comprised of costs incurred associated with an exit or disposal activity other than for a discontinued operations as defined under generally accepted accounting principles. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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