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SUPPLEMENTAL FINANCIAL STATEMENT DATA - Equipment and Leasehold Improvements, Net - Tabular Disclosure (Details) - USD ($) $ in Thousands	Jul. 01, 2022	Dec. 31, 2021
EQUIPMENT AND LEASEHOLD IMPROVEMENTS
Equipment under finance leases	$ 4,541	$ 3,286
Equipment and leasehold improvements, gross	45,340	39,891
Accumulated depreciation and amortization	(25,958)	(23,134)
Total equipment and leasehold improvements, net	19,382	16,757
Furniture and Fixtures [Member]
EQUIPMENT AND LEASEHOLD IMPROVEMENTS
Equipment and leasehold improvements	4,018	4,070
Computer Hardware and Software [Member]
EQUIPMENT AND LEASEHOLD IMPROVEMENTS
Equipment and leasehold improvements	30,659	26,425
Leasehold Improvements [Member]
EQUIPMENT AND LEASEHOLD IMPROVEMENTS
Equipment and leasehold improvements	3,011	3,011
Automobiles Trucks and Field Equipment [Member]
EQUIPMENT AND LEASEHOLD IMPROVEMENTS
Equipment and leasehold improvements	$ 3,111	$ 3,099

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- Definition

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

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