Segment Reporting and Geographic Information (Revenues by Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 43,170	$ 38,385	$ 128,612	$ 115,465
Before intersegment adjustments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	43,216	38,391	128,775	115,553
Network Equipment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	21,979	22,806	66,131	64,852
Network Integration [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	21,237	15,585	62,644	50,701
Intersegment adjustments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ (46)	$ (6)	$ (163)	$ (88)