Acquisitions (Acquisition of Integrated Voice Solutions, Inc.) (Details) (Integrated Voice Solutions, Inc., USD $)	Sep. 15, 2010
Business Acquisition [Line Items]
Business acquisition, percentage of voting interests acquired	100.00%
Business acquisition, cost of acquired entity, cash paid	$ 4,100,000
Purchase Price Allocation [Abstract]
Cash	1,170,000
Accounts receivable	47,000
Other current assets	28,000
Property and equipment	12,000
Goodwill	1,922,000
Total assets acquired	5,079,000
Liabilities assumed	(1,007,000)
Net assets acquired	4,072,000
Customer relationships
Purchase Price Allocation [Abstract]
Intangible assets	1,500,000
Developed technology
Purchase Price Allocation [Abstract]
Intangible assets	$ 400,000

Amount of cash paid to acquire the entity.

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Percentage of voting equity interests acquired in the business combination.

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The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.

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The amount of acquisition cost of a business combination allocated to assets acquired.

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The total purchase price of the acquired entity. This includes cash paid to equity interest holders of the acquired entity, fair value of debt and equity securities issued to equity holders of the acquired entity, and transaction costs paid to third parties to consummate the acquisition.

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The amount of cash and cash equivalents acquired in a business combination.

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The amount of acquisition cost of a business combination allocated to prepaid expenses and other current assets. Does not include amounts allocated to cash and cash equivalents, marketable securities, receivables, inventory, and assets not to be used.

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The amount of acquisition cost of a business combination allocated to receivables.

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Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

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The amount of acquisition cost of a business combination allocated to liabilities assumed.

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The amount of acquisition cost of a business combination allocated to property, plant and equipment to be used in ongoing operations.

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