EARNINGS PER SHARE (EPS) - Computation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jul. 01, 2022	Apr. 01, 2022	Oct. 01, 2021	Jul. 02, 2021	Apr. 02, 2021	Sep. 30, 2022	Oct. 01, 2021
Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]
Net income (loss)	$ 76	$ (4,326)	$ (3,773)	$ 840	$ (4,601)	$ (3,766)	$ (8,023)	$ (7,527)
Net income (loss) - basic	76			840			(8,023)	(7,527)
Net income (loss) - diluted	$ 76			$ 840			$ (8,023)	$ (7,527)
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Weighted-average common shares outstanding (in shares)	13,110			12,606			12,971	12,391
Effect of dilutive stock options and restricted stock awards (in shares)	250			535
Weighted-average common shares outstanding-diluted (in shares)	13,360			13,141			12,971	12,391
Earnings Per Share, Diluted [Abstract]
Basic (in dollars per share)	$ 0.01			$ 0.07			$ (0.62)	$ (0.61)
Diluted (in dollars per share)	$ 0.01			$ 0.06			$ (0.62)	$ (0.61)