Segment Reporting and Geographic Information (Revenues by Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 43,124	$ 38,175	$ 85,442	$ 77,080
Before intersegment adjustments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	43,188	38,235	85,560	77,163
Network Equipment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	21,833	21,100	44,152	42,046
Network Integration [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	21,355	17,135	41,408	35,117
Intersegment adjustments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ (64)	$ (60)	$ (118)	$ (83)