Segment Information - Revenue by Major Customer (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Nokia Siemens Networks [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	20.50%	20.30%	19.00%	22.80%
NEC [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		16300.00%	11.00%	11.80%
Danaher [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	10.40%