RECENT RESTAURANT EXPANSION AND OTHER DEVELOPMENTS - Pro Forma Financial Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 02, 2021	Oct. 03, 2020
Business Acquisition [Line Items]
Shares - Basic (in shares)	3,516	3,500
Shares - Diluted (in shares)	3,604	3,500
Blue Moon Fish Company
Business Acquisition [Line Items]
Total revenues	$ 132,547	$ 110,700
Net income (loss)	$ 12,926	$ (4,303)
Net income (loss) per share - basic (in dollars per share)	$ 3.68	$ (1.23)
Net income (loss) per share - diluted (in dollars per share)	$ 3.59	$ (1.23)
Shares - Basic (in shares)	3,516	3,500
Shares - Diluted (in shares)	3,604	3,500