INCOME TAXES - Summary of Income Tax Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 110	$ 152
Additions based on tax positions taken in current and prior years	407	125
Settlements	(205)	(167)
Lapse in statute of limitations	(109)	0
Decreases based on tax positions taken in prior years	(45)	0
Balance at end of year	$ 158	$ 110