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REVENUE RECOGNITION - Percentage of completion (Details) - USD ($)
$ in Thousands
Mar. 26, 2022
Dec. 25, 2021
Mar. 27, 2021
REVENUE RECOGNITION      
Cost and Earnings in Excess of Billings $ 6,759 $ 5,602 $ 3,408
Billings in Excess of Cost and Earnings $ 12,634 $ 10,744 $ 9,396