CONTRACT ASSETS AND CONTRACT LIABILITIES (Details) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023
CONTRACT ASSETS AND CONTRACT LIABILITIES
Costs incurred on uncompleted contracts	$ 18,276	$ 23,318
Estimated earnings on uncompleted contracts	781	3,602
Earned revenues	19,057	26,920
Less: billings to date	16,431	24,819
Net costs in excess of billings on uncompleted contracts	2,626	2,101
Costs and estimated earnings in excess of billings on uncompleted contracts	3,602	3,296
Billings in excess of costs and estimated earnings on uncompleted contracts	(976)	(1,195)
Net costs in excess of billings on uncompleted contracts	$ 2,626	$ 2,101