RECENT RESTAURANT EXPANSION AND OTHER DEVELOPMENTS - Pro Forma Financial Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 02, 2022	Apr. 03, 2021	Apr. 02, 2022	Apr. 03, 2021
Business Acquisition [Line Items]
Shares - Basic (in shares)	3,552	3,511	3,552	3,507
Shares - Diluted (in shares)	3,604	3,627	3,600	3,579
Blue Moon Fish Company
Business Acquisition [Line Items]
Total revenues				$ 46,743
Net income				$ 3,433
Net income per share - basic (in dollars per share)				$ 0.98
Net income per share - diluted (in dollars per share)				$ 0.96
Shares - Basic (in shares)				3,507
Shares - Diluted (in shares)				3,579