RECENT RESTAURANT EXPANSION AND OTHER DEVELOPMENTS - Pro Forma Financial Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jan. 01, 2022	Jan. 02, 2021
Business Acquisition [Line Items]
Shares - Basic (in shares)	3,551	3,502
Shares - Diluted (in shares)	3,597	3,502
Blue Moon Fish Company
Business Acquisition [Line Items]
Total revenues		$ 20,976
Net income (loss)		$ (728)
Net income (loss) per share - basic (in dollars per share)		$ (0.21)
Net income (loss) per share - diluted (in dollars per share)		$ (0.21)
Shares - Basic (in shares)		3,502
Shares - Diluted (in shares)		3,502