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Revenue Recognition (Tables) | 12 Months Ended
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Jan. 01, 2021
Revenue From Contract With Customer [Abstract] |
Summary of Percent of Revenues | The following table discloses the percent of the Company’s revenue generated from time and materials contracts:
|  | Fiscal Years |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Engineering & other scientific |  | 61% |  |  | 66% |  |  | 64% |
Environmental and health |  | 19% |  |  | 18% |  |  | 18% |
Total time and materials revenues |  | 80% |  |  | 84% |  |  | 82% |
The following table discloses the percent of the Company’s revenue generated from fixed price contracts:
|  | Fiscal Years |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Engineering & other scientific |  | 19% |  |  | 15% |  |  | 17% |
Environmental and health |  | 1% |  |  | 1% |  |  | 1% |
Total fixed price revenues |  | 20% |  |  | 16% |  |  | 18% |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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