Segment Information - Revenue by Major Customer (Details)	3 Months Ended			9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Nokia Siemens Networks [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	14.10%		13.00%	19.50%	16.50%
Philips Healthcare [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage			18.70%		16.40%
An Asian Carrier [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	14.20%		10.60%
Accounts Receivable [Member] | Nokia Siemens Networks [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		18.50%
Accounts Receivable [Member] | Philips Healthcare [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		13.90%
Accounts Receivable [Member] | An Asian Carrier [Member]
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage				25.70%