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SEGMENT AND GEOGRAPHICAL INFORMATION - Segment Assets (Details) - USD ($) $ in Thousands | Jul. 03, 2026 | Jan. 02, 2026 | Jul. 04, 2025
--- | --- | --- | ---
Assets: |  |  |
Segment assets | $ 634,875 | $ 544,211 | $ 484,851
Operating Segments | Energy |  |  |
Assets: |  |  |
Segment assets | 504,428 |  | 362,141
Operating Segments | Engineering and Consulting |  |  |
Assets: |  |  |
Segment assets | 45,005 |  | 41,207
Corporate, Non-Segment |  |  |
Assets: |  |  |
Segment assets | $ 85,442 |  | $ 81,503

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