Impairment of Long-Lived Assets and Goodwill (Details) $ in Thousands	6 Months Ended
	Mar. 28, 2017 USD ($) restaurants	Mar. 31, 2016 restaurants	Sep. 27, 2016 USD ($)
Impaired Long-Lived Assets Held and Used [Line Items]
Number of restaurants impaired | restaurants	0	0
Goodwill	$ 15,076		$ 15,076
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	$ 14,980