Impairment of Long-Lived Assets and Goodwill (Details) $ in Thousands	3 Months Ended
	Dec. 26, 2017 USD ($) restaurants	Sep. 26, 2017 USD ($)
Impaired Long-Lived Assets Held and Used [Line Items]
Number of restaurants impaired | restaurants	0
Goodwill	$ 15,150	$ 15,150
Good Times Drive Thru Inc. [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Goodwill	96
Bad Daddy's Franchise Development, LLC [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Goodwill	$ 15,054