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SUPPLEMENTAL FINANCIAL STATEMENT DATA - Equipment and Leasehold Improvements, Net - Tabular Disclosure (Details) - USD ($) $ in Thousands	Oct. 03, 2025	Dec. 27, 2024
Equipment and Leasehold Improvements
Equipment under finance leases	$ 7,403	$ 7,052
Equipment and leasehold improvements, gross	78,206	70,962
Accumulated depreciation and amortization	(46,892)	(41,428)
Equipment and leasehold improvements, net	31,314	29,534
Furniture and fixtures
Equipment and Leasehold Improvements
Equipment and leasehold improvements	4,745	4,594
Computer hardware and software
Equipment and Leasehold Improvements
Equipment and leasehold improvements	58,011	51,904
Leasehold improvements
Equipment and Leasehold Improvements
Equipment and leasehold improvements	4,011	3,804
Automobiles, trucks, and field equipment
Equipment and Leasehold Improvements
Equipment and leasehold improvements	$ 4,036	$ 3,608

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Amount, before accumulated amortization, of right-of-use asset from finance lease.

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Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from finance lease.

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Amount, after accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset.

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