Segment Reporting and Geographic Information (Balance Sheet and Statement of Cash Flow Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Additions to Fixed Assets	$ 955	$ 1,435
Assets	123,249		128,565
Network Equipment [Member]
Segment Reporting Information [Line Items]
Additions to Fixed Assets	922	164
Assets	44,950		44,445
Network Integration [Member]
Segment Reporting Information [Line Items]
Additions to Fixed Assets	32	37
Assets	45,832		47,400
Corporate [Member]
Segment Reporting Information [Line Items]
Additions to Fixed Assets	1	31
Corporate Unallocated and Intersegment Adjustments [Member]
Segment Reporting Information [Line Items]
Assets	32,467		36,720
Discontinued Operations [Member]
Segment Reporting Information [Line Items]
Additions to Fixed Assets	$ 0	$ 1,203