Impairment of Long-Lived Assets and Goodwill (Narrative) (Details) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2020 USD ($) restaurants	Sep. 24, 2019 USD ($)
Impaired Long-Lived Assets Held and Used [Line Items]
Number of restaurants impaired | restaurants		2
Goodwill	$ 5,150	$ 5,150	$ 15,150
Good Times [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Goodwill	96	96
Non-cash impairment charge			391
Good Times [Member] | Bad Daddy's restaurant in South Carolina [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Non-cash impairment charge			$ 2,380
Bad Daddy's Franchise Development, LLC [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Goodwill	5,054	$ 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