Segment Reporting and Geographic Information (Balance Sheet and Statement of Cash Flow Information) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Additions to Fixed Assets	$ 1,236	$ 1,914
Assets	101,601		$ 114,572
Network Equipment [Member]
Segment Reporting Information [Line Items]
Additions to Fixed Assets	1,168	1,736
Assets	42,472		40,664
Network Integration [Member]
Segment Reporting Information [Line Items]
Additions to Fixed Assets	74	95
Assets	49,270		56,921
Corporate [Member]
Segment Reporting Information [Line Items]
Additions to Fixed Assets	(6)	$ 83
Corporate Unallocated and Intersegment Adjustments [Member]
Segment Reporting Information [Line Items]
Assets	$ 9,859		$ 16,987