Segment Reporting and Geographic Information (Balance Sheet and Statement of Cash Flow Information) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Additions to Fixed Assets	$ 1,491	$ 3,662	$ 2,909
Assets	114,572	127,947
Network Equipment segment [Member]
Segment Reporting Information [Line Items]
Additions to Fixed Assets	1,230	3,329
Assets	40,664	48,955
Network Integration segment [Member]
Segment Reporting Information [Line Items]
Additions to Fixed Assets	178	104
Assets	56,921	54,625
Corporate [Member]
Segment Reporting Information [Line Items]
Additions to Fixed Assets	83	229
Corporate and Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Assets	$ 16,987	$ 24,367