Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - Long Term [Member] - USD ($) $ in Thousands	Sep. 24, 2019	Sep. 25, 2018
Deferred income tax assets (liabilities):
Tax effect of net operating loss carry-forward	$ 4,631	$ 3,605
General business credits	3,065	2,264
Partnership/Joint Venture basis differences	(58)	(63)
Deferred revenue	89	111
Property and equipment basis differences	(1,315)	(1,444)
Intangibles basis differences	(1,107)	(803)
Other accrued liability and asset difference	1,335	1,183
Deferred tax assets	6,640	4,853
Less valuation allowance	(6,640)	(4,853)
Net deferred tax asset (liabilities)