EARNINGS PER SHARE (EPS) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 03, 2020	Mar. 29, 2019
Loss per share
Net loss	$ (8,154)	$ (417)
Weighted-average common shares outstanding (in shares)	11,510	10,974
Weighted-average common shares outstanding-diluted (in shares)	11,510	10,974
Loss per share:
Basic	$ (0.71)	$ (0.04)
Diluted	$ (0.71)	$ (0.04)