Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands		Sep. 26, 2017	Sep. 27, 2016
Current [Member]
Deferred assets (liabilities):
Tax effect of net operating loss carry-forward		$ 0	$ 0
General business credits		0	0
Partnership/Joint Venture basis differences		0	0
Deferred revenue		0	0
Property and equipment basis differences		0	0
Intangibles basis differences		0	0
Other accrued liability and asset difference		117	112
Net deferred tax assets		117	112
Less valuation allowance	[1]	(117)	(112)
Net deferred tax assets		0	0
Long Term [Member]
Deferred assets (liabilities):
Tax effect of net operating loss carry-forward		4,084	2,926
General business credits		1,378	680
Partnership/Joint Venture basis differences		(126)	(15)
Deferred revenue		75	79
Property and equipment basis differences		(859)	(567)
Intangibles basis differences		(705)	(190)
Other accrued liability and asset difference		1,454	1,199
Net deferred tax assets		5,301	4,112
Less valuation allowance	[1]	(5,301)	(4,112)
Net deferred tax assets		$ 0	$ 0

[1] The valuation allowance increased by $1,194,000 during the year ended September 26, 2017.