Major Customers and Concentrations of Credit Risk (Tables)

12 Months Ended

Dec. 31, 2018

Risks and Uncertainties [Abstract]

Schedule of Concentration Risk by Major Customers

Net revenues from our top ten customers, including The Boeing Company (“Boeing”), Lockheed Martin Corporation (“Lockheed Martin”), Raytheon Company (“Raytheon”), Spirit AeroSystems Holdings, Inc. (“Spirit”), and United Technologies Corporation (“United Technologies”), represented the following percentages of total net sales:

	Years Ended December 31,
	2018		2017		2016
Boeing	17.0	%	16.3	%	17.3	%
Lockheed Martin	4.4	%	5.5	%	5.6	%
Raytheon	11.7	%	13.5	%	8.4	%
Spirit	9.5	%	8.2	%	8.2	%
United Technologies	4.6	%	4.7	%	5.3	%
Top ten customers (1)	62.9	%	62.5	%	58.7	%

(1) Includes Boeing, Lockheed Martin, Raytheon, Spirit, and United Technologies.

Boeing, Lockheed Martin, Raytheon, Spirit, and United Technologies represented the following percentages of total accounts receivable:

	December 31,
	2018		2017
Boeing	8.0	%	7.8	%
Lockheed Martin	2.5	%	5.9	%
Raytheon	3.2	%	1.4	%
Spirit	—	%	13.5	%
United Technologies	2.5	%	2.3	%