Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - Long Term [Member] - USD ($) $ in Thousands	Sep. 28, 2021	Sep. 29, 2020
Deferred income tax assets (liabilities):
Tax effect of net operating loss carry-forward	$ 4,061	$ 2,686
General business credits	4,353	3,618
Partnership/joint venture basis differences	(5)	(2)
Deferred revenue	65	80
Property and Equipment basis differences	(1,764)	(1,866)
Intangibles basis differences	678	1,087
ROU asset	(9,804)	(10,516)
Long-term lease liability	11,782	12,549
Other accrued liability and asset difference	5	(232)
Deferred tax assets	9,371	7,404
Less valuation allowance	(9,371)	(7,404)
Net deferred tax asset (liabilities)