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Description of Business and Basis of Presentation (Tables) | 12 Months Ended
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Sep. 28, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Revenues Realized from Each of These Types of Contracts | The percentage of revenues realized from each of these types of contracts for the fiscal years ended September 28, 2018, September 29, 2017 and September 30, 2016 was as follows:
| For the Years Ended
| September 28, 2018 |  | September 29, 2017 |  | September 30, 2016
Cost-reimbursable | 76 | % |  | 81 | % |  | 82 | %
Fixed-price | 24 | % |  | 19 | % |  | 18 | %

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- Definition Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9031-108599 + Details
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