Major Customers and Concentrations of Credit Risk (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure of Major Customers and Concentrations of Credit Risk [Abstract]

Sales to Major Customers

Net revenues from our top ten customers, including the Boeing Company (“Boeing”) and Raytheon Company (“Raytheon”), represented the following percentages of total net sales:

	Years Ended December 31,
	2014		2013		2012
Boeing	20	%	18	%	17	%
Raytheon	9	%	10	%	7	%
Top ten customers	59	%	57	%	55	%

Receivables from Customers

Boeing and Raytheon represented the following percentages of total accounts receivable:

	December 31,
	2014		2013
Boeing	12	%	12	%
Raytheon	10	%	8	%