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Basis of Presentation (Details Textual) (USD $)
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3 Months Ended | 3 Months Ended | 12 Months Ended | |||||||
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Jun. 30, 2013
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Mar. 31, 2013
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Jun. 30, 2013
Sale of Conference Plus, Inc [Member]
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Mar. 31, 2013
Sale of Conference Plus, Inc [Member]
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Dec. 31, 2012
Sale of Conference Plus, Inc [Member]
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Dec. 31, 2011
Sale of Conference Plus, Inc [Member]
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Dec. 31, 2012
Sale of Customer Networking Solutions Assets [Member]
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Sep. 30, 2012
Sale of Customer Networking Solutions Assets [Member]
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Mar. 31, 2012
Sale of Customer Networking Solutions Assets [Member]
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Apr. 02, 2013
Kentrox [Member]
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| Business Acquisition [Line Items] | ||||||||||
| Equity Method Investment, Ownership Percentage | 100.00% | |||||||||
| Sale of conference plus | $ 40,300,000 | |||||||||
| Escrow deposit made | 4,100,000 | |||||||||
| DISCO Loss Contingency, Loss in Period | 1,500,000 | |||||||||
| Escrow Deposit Released | 500,000 | 1,600,000 | ||||||||
| Proceeds from CNS asset sale | 36,700,000 | |||||||||
| Litigation Settlement, Gross | 900,000 | |||||||||
| Loss Contingency Accrual, at Carrying Value | 1,400,000 | 1,700,000 | 400,000 | |||||||
| Additional expense related to CNS claim | 500,000 | |||||||||
| Unrecognized Tax Benefits | $ 2,700,000 | |||||||||
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This element represents the gross amount awarded, to be received by, or to be remitted to the entity in settlement of litigation occurring during the period. No definition available.
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| X | ||||||||||
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- Definition
The carrying amount as of the balance sheet date of the combined total of loss contingency liabilities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Aggregate cash proceeds received from a combination of transactions that are classified as investing activities in which assets, which may include one or more investments, are sold to third-party buyers. This element can be used by entities to aggregate proceeds from all asset sales that are classified as investing activities. No definition available.
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| X | ||||||||||
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- Definition
The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Additional expenses on claims. No definition available.
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| X | ||||||||||
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- Definition
Business segment sale consideration. No definition available.
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| X | ||||||||||
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- Definition
Escrow Deposit Released. No definition available.
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