Segment Information - Accounts Receivable (Details)	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Nokia Siemens Networks [Member]
Concentration Risk [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	17.70%		18.60%	22.10%	18.30%
Nokia Siemens Networks [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		18.50%		10.10%
Mavenir Systems [Member]
Concentration Risk [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	10.50%
Mavenir Systems [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Entity-Wide Revenue, Major Customer, Percentage				11.20%
Philips Healthcare [Member]
Concentration Risk [Line Items]
Entity-Wide Revenue, Major Customer, Percentage			16.00%	10.00%	15.10%
Philips Healthcare [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		13.90%
An Asian Carrier [Member]
Concentration Risk [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	10.50%
An Asian Carrier [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Entity-Wide Revenue, Major Customer, Percentage				15.00%
Sanmina SCI Corp [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Entity-Wide Revenue, Major Customer, Percentage				14.60%
NEC [Member]
Concentration Risk [Line Items]
Entity-Wide Revenue, Major Customer, Percentage					10.60%