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BUSINESS COMBINATIONS - Pro Forma Information - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jul. 04, 2025	Jul. 04, 2025	Jun. 28, 2024
Alternative Power Generation, Inc., Alternative Power Generation, Inc., and Enica Engineering, PLLC
Business Acquisition, Pro Forma Information
Business combination, pro forma information, revenue of acquiree since acquisition date, actual	$ 11.1	$ 17.2
Business combination, pro forma information, income (loss) from continuing operations of acquiree since acquisition date, actual	2.0	3.0
Alternative Power Generation, Inc.
Business Acquisition, Pro Forma Information
Business combination, pro forma information, revenue of acquiree since acquisition date, actual	7.3	9.9
Business combination, pro forma information, income (loss) from continuing operations of acquiree since acquisition date, actual	0.8	0.9
Alpha Inspections, Inc.
Business Acquisition, Pro Forma Information
Business combination, pro forma information, revenue of acquiree since acquisition date, actual	0.9	1.5
Business combination, pro forma information, income (loss) from continuing operations of acquiree since acquisition date, actual	0.5		$ 0.7
Enica Engineering, PLLC
Business Acquisition, Pro Forma Information
Business combination, pro forma information, revenue of acquiree since acquisition date, actual	2.9	5.8
Business combination, pro forma information, income (loss) from continuing operations of acquiree since acquisition date, actual	$ 0.7	$ 1.4

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