Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - Long Term [Member] - USD ($) $ in Thousands	Sep. 29, 2020	Sep. 24, 2019
Deferred income tax assets (liabilities):
Tax effect of net operating loss carry-forward	$ 2,686	$ 4,631
General business credits	3,618	3,065
Partnership/Joint Venture basis differences	(2)	(58)
Deferred revenue	80	89
Property and equipment basis differences	(1,866)	(1,315)
Intangibles basis differences	1,087	(1,107)
ROU asset	(10,516)
Long-term lease liability	12,549
Other accrued liability and asset difference	(232)	1,335
Deferred tax assets	7,404	6,640
Less valuation allowance	(7,404)	(6,640)
Net deferred tax asset (liabilities)