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v3.22.4

Segment Information (Detail) - USD ($) | 12 Months Ended
--- | ---
Dec. 30, 2022 | Dec. 31, 2021 | Jan. 01, 2021
Segment Reporting Information [Line Items] |  |  |
Revenues | $ 513,293,000 | $ 466,269,000 | $ 399,900,000
Operating Income | 140,842,000 | 108,927,000 | 83,249,000
Capital Expenditures | 12,647,000 | 6,637,000 | 5,107,000
Depreciation and Amortization | 7,079,000 | 6,487,000 | 6,871,000
Operating segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Income | 180,019,000 | 168,352,000 | 127,344,000
Capital Expenditures | 4,835,000 | 2,952,000 | 2,339,000
Depreciation and Amortization | 4,660,000 | 4,224,000 | 4,435,000
Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Income | (39,177,000) | (59,425,000) | (44,095,000)
Capital Expenditures | 7,812,000 | 3,685,000 | 2,768,000
Depreciation and Amortization | 2,419,000 | 2,263,000 | 2,436,000
Engineering and Other Scientific | Operating segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 427,796,000 | 380,909,000 | 319,346,000
Operating Income | 152,679,000 | 140,400,000 | 100,616,000
Capital Expenditures | 4,661,000 | 2,792,000 | 2,237,000
Depreciation and Amortization | 4,489,000 | 4,031,000 | 4,239,000
Environmental and Health | Operating segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 85,497,000 | 85,360,000 | 80,554,000
Operating Income | 27,340,000 | 27,952,000 | 26,728,000
Capital Expenditures | 174,000 | 160,000 | 102,000
Depreciation and Amortization | $ 171,000 | $ 193,000 | $ 196,000

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