NET INCOME PER SHARE - Summary of Shares Used in EPS Calculation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Jul. 02, 2021	Apr. 02, 2021	Jan. 01, 2021	Jun. 26, 2020	Mar. 27, 2020	Dec. 27, 2019	Jul. 02, 2021	Jun. 26, 2020
Basic net income per share:
Net income	$ 1,026	$ (348)	$ 1,537	$ 2,114	$ 1,523	$ 1,189	$ 2,215	$ 4,826
Less: Income attributable to non-vested shares	4			10			9	23
Net income available to common stockholders	$ 1,022			$ 2,104			$ 2,206	$ 4,803
Basic (in shares)	10,616,613			10,424,056			10,574,713	10,388,872
Basic income per share	$ 0.10			$ 0.20			$ 0.21	$ 0.46
Diluted net income per share:
Net income	$ 1,026	$ (348)	$ 1,537	$ 2,114	$ 1,523	$ 1,189	$ 2,215	$ 4,826
Shares used in computing basic net income per share	10,616,613			10,424,056			10,574,713	10,388,872
Dilutive effect of options and non-vested shares	432,055			334,036			457,532	308,416
Shares used in computing diluted net income per share	11,048,668			10,758,092			11,032,245	10,697,288
Diluted net income per share	$ 0.09			$ 0.20			$ 0.20	$ 0.45
Anti-dilutive shares excluded	11,825						11,825