Segment Information Revenue by Major Customer (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Nokia Siemens Networks [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Customer	.170	.187	0.225
Philips Healthcare [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Customer	.149
NEC [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Customer			.111
Accounts Receivable [Member] | Nokia Siemens Networks [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	18.50%	20.70%
Accounts Receivable [Member] | Philips Healthcare [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	13.90%