Segment Reporting and Geographic Information (Statement of Operations Information by Business Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Gross profit
Gross Profit	$ 13,876us-gaap_GrossProfit	$ 13,251us-gaap_GrossProfit
Depreciation expense
Depreciation expense	530us-gaap_Depreciation	624us-gaap_Depreciation
Operating income (loss)
Operating income (loss)	(811)us-gaap_OperatingIncomeLoss	(3,849)us-gaap_OperatingIncomeLoss
Total before intersegment adjustments [Member]
Gross profit
Gross Profit	13,875	13,249
Operating income (loss)
Operating income (loss)	307	(1,994)
Network Equipment [Member]
Gross profit
Gross Profit	11,544	10,759
Depreciation expense
Depreciation expense	471	536
Operating income (loss)
Operating income (loss)	(198)	(2,839)
Network Integration [Member]
Gross profit
Gross Profit	2,331	2,490
Depreciation expense
Depreciation expense	30	49
Operating income (loss)
Operating income (loss)	505	845
Corporate Unallocated and Intersegment Adjustments [Member]
Gross profit
Gross Profit	1	2
Operating income (loss)
Operating income (loss)	(1,118)	(1,855)
Corporate [Member]
Depreciation expense
Depreciation expense	$ 29	$ 39

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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- Definition

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1,2)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

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