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Revenue Recognition (Tables) | 6 Months Ended
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Jul. 03, 2026
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:
|  | Three Months Ended |  |  | Six Months Ended |
|  | July 3, 2026 |  |  | July 4, 2025 |  |  | July 3, 2026 |  |  | July 4, 2025 |
Engineering & Other Scientific |  |  | 68 | % |  |  | 65 | % |  |  | 65 | % |  |  | 66 | %
Environmental and Health |  |  | 12 | % |  |  | 15 | % |  |  | 13 | % |  |  | 14 | %
Total time and materials revenues |  |  | 80 | % |  |  | 80 | % |  |  | 78 | % |  |  | 80 | %
The following table discloses the percent of the Company’s revenue generated from fixed price contracts:
|  | Three Months Ended |  |  | Six Months Ended |
|  | July 3, 2026 |  |  | July 4, 2025 |  |  | July 3, 2026 |  |  | July 4, 2025 |
Engineering & Other Scientific |  |  | 19 | % |  |  | 19 | % |  |  | 21 | % |  |  | 19 | %
Environmental and Health |  |  | 1 | % |  |  | 1 | % |  |  | 1 | % |  |  | 1 | %
Total fixed price revenues |  |  | 20 | % |  |  | 20 | % |  |  | 22 | % |  |  | 20 | %

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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 -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 + Details
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