Segment Information - Revenue by Major Customer (Details)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Nokia Siemens Networks [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	18.00%	17.40%
NEC [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	13.70%	14.50%
Philips Healthcare [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	14.20%