Segment Information - Accounts Receivable (Details)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Nokia Siemens Networks [Member]
Concentration Risk [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	26.20%	18.00%
Nokia Siemens Networks [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	28.40%		18.50%
Philips Healthcare [Member]
Concentration Risk [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	11.90%	14.20%
Philips Healthcare [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	12.50%		13.90%
NEC [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		13.70%