Impairment of Long-Lived Assets and Goodwill (Narrative) (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2020 USD ($) restaurants	Mar. 30, 2021 USD ($)	Sep. 29, 2020 USD ($)	Mar. 30, 2020 USD ($)
Impaired Long-Lived Assets Held and Used [Line Items]
Number of restaurants impaired | restaurants		2
Goodwill	$ 5,150	$ 5,150	$ 5,150	$ 5,150
Good Times [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Goodwill					$ 96
Bad Daddy's [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Goodwill					$ 5,054
Bad Daddy's Restaurants In North Carolina and Tennessee [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Non-cash impairment charge	$ 4,359