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Organization and Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Sep. 29, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 24, 2019	Sep. 29, 2020	Sep. 24, 2019
Organization And Summary Of Significant Accounting Policies [Line Items]
Advertising expenses					$ 244	$ 310
FDIC insured limit	$ 250				250
Goodwill	5,150			$ 15,150	5,150	15,150
Goodwill impairment loss					10,000
Deferred liability	$ 1,200				$ 1,200
Percentage of deferred employment tax	50.00%				50.00%
Notes receivable	$ 13				$ 13
Receivables	656			810	656	$ 810
Franchise receivables	77				77
Lease incentive	338				338
Receivable from advertising cooperative fund	$ 241				$ 241
Stock Options [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Shares with anti-dilutive effect excluded from the computation of Diluted EPS					722,871	868,439
Minimum [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives					3 years
Maximum [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives					8 years
Four of Bad Daddy's limited liability companies [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Ownership interest	54.00%				54.00%
Four of Bad Daddy's limited liability companies [Member] \| Minimum [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Ownership interest	50.00%				50.00%
Four of Bad Daddy's limited liability companies [Member] \| Maximum [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Ownership interest	75.00%				75.00%
One of Bad Daddy's limited liability companies [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Ownership interest	23.00%				23.00%
Good Times Drive Thru Inc. [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Goodwill	$ 96			96	$ 96	$ 96
Asset impairment costs	315			391
Bad Daddy's International, LLC [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Goodwill	$ 5,054			15,054	$ 5,054	$ 15,054
Goodwill impairment loss			$ 10,000
Asset impairment costs		$ 932	$ 4,359	$ 2,380