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EARNINGS PER SHARE (EPS) - Computation (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 29, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Jul. 01, 2022
Apr. 01, 2022
Sep. 29, 2023
Sep. 30, 2022
Net income (loss)                
Net income (loss) $ 1,566 $ 397 $ 932 $ 76 $ (4,326) $ (3,773) $ 2,895 $ (8,023)
Net income (loss) - basic 1,566     76     2,895 (8,023)
Net income (loss) - diluted $ 1,566     $ 76     $ 2,895 $ (8,023)
Weighted-average shares outstanding:                
Weighted-average common shares outstanding (in shares) 13,462     13,110     13,357 12,971
Effect of dilutive stock options and restricted stock awards (in shares) 247     250     206  
Weighted-average common shares outstanding-diluted (in shares) 13,709     13,360     13,563 12,971
Earnings (Loss) per share:                
Basic (in dollars per share) $ 0.12     $ 0.01     $ 0.22 $ (0.62)
Diluted (in dollars per share) $ 0.11     $ 0.01     $ 0.21 $ (0.62)