INCOME (LOSS) PER SHARE Earnings Per Share - Summary of Shares Used in EPS Calculation (Details) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Mar. 29, 2019 USD ($) $ / shares shares	Dec. 28, 2018 USD ($)	Mar. 30, 2018 USD ($) $ / shares shares	Dec. 29, 2017 USD ($)	Mar. 29, 2019 USD ($) $ / shares shares	Mar. 30, 2018 USD ($) $ / shares shares
Earnings Per Share [Abstract]
Common stock, number of classes	2				2
Basic net income per share:
Net income | $	$ 670	$ 1,072	$ 1,579	$ (494)		$ 1,085
Less: Income attributable to non-vested shares | $	4		16		$ 9	11
Net income available to common stockholders | $	$ 666		$ 1,563		$ 1,733	$ 1,074
Basic (in shares)	10,286,876		10,217,781		10,274,772	10,211,101
Basic net income (loss) per share (in usd per share) | $ / shares	$ 0.06		$ 0.15		$ 0	$ 0
Diluted net income per share:
Net income | $	$ 670		$ 1,579		$ 1,742	$ 1,085
Shares used in computing basic net income (loss) per share(in shares)	10,286,876		10,217,781		10,274,772	10,211,101
Dilutive effect of non-vested shares	391,182		130,881		299,304	105,661
Shares used in computing diluted net income per share	10,678,058		10,348,662		10,574,076	10,316,762
Diluted net income (loss) per share (in usd per share) | $ / shares	$ 0.06		$ 0.15		$ 0	$ 0
Anti-dilutive shares excluded (in shares)	0		353,495		19,583	339,104