Operating Segments and Related Disclosures - Summary of Customers that Represented More than 10% of Net Sales (Details) - Customers - Sales Revenue, Net	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Lockheed Martin Corporation
Revenue, Major Customer [Line Items]
Percentage of net sales	29.00%	18.00%
Raytheon Company
Revenue, Major Customer [Line Items]
Percentage of net sales	21.00%	18.00%
United Launch Alliance
Revenue, Major Customer [Line Items]
Percentage of net sales	20.00%	23.00%
NASA
Revenue, Major Customer [Line Items]
Percentage of net sales	17.00%	18.00%
Boeing
Revenue, Major Customer [Line Items]
Percentage of net sales		11.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration