Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Capital Contributed in Excess of Par Value [Member]	Non-Controlling Interest In Partnerships [Member]	Accumulated Deficit [Member]	Total
BALANCES at Sep. 26, 2017		$ 12	$ 58,939	$ 2,713	$ (24,380)	$ 37,284
BALANCES, shares at Sep. 26, 2017		12,427,280
Stock-based compensation cost			118			118
Restricted stock unit vesting
Restricted stock grant vesting, shares		41,046
Income attributable to non-controlling interests				173		173
Distributions to unrelated limited partners				(256)		(256)
Net loss attributable to Good Times Restaurants Inc and comprehensive loss					(583)	(583)
BALANCES at Dec. 26, 2017		$ 12	59,057	2,630	(24,963)
BALANCES, shares at Dec. 26, 2017		12,468,326
Stock-based compensation cost			97			97
Stock option exercise
Income attributable to non-controlling interests				299		299
Distributions to unrelated limited partners				(242)		(242)
Contributions from unrelated limited partners				17		17
Net loss attributable to Good Times Restaurants Inc and comprehensive loss					(431)	(431)
BALANCES at Mar. 27, 2018		$ 12	59,154	2,704	(25,394)	36,476
BALANCES, shares at Mar. 27, 2018		12,468,326
BALANCES at Sep. 25, 2018		$ 12	59,385	3,238	(25,414)	37,221
BALANCES, shares at Sep. 25, 2018		12,481,162
Stock-based compensation cost			112			112
Restricted stock unit vesting		$ 1				1
Restricted stock grant vesting, shares		40,949
Stock option exercise			3			3
Stock option exercise, shares		667
Income attributable to non-controlling interests				309		309
Distributions to unrelated limited partners				(478)		(478)
Net loss attributable to Good Times Restaurants Inc and comprehensive loss					(1,051)	(1,051)
BALANCES at Dec. 25, 2018		$ 13	59,500	3,069	(26,465)	36,117
BALANCES, shares at Dec. 25, 2018		12,522,778
BALANCES at Sep. 25, 2018		$ 12	59,385	3,238	(25,414)	$ 37,221
BALANCES, shares at Sep. 25, 2018		12,481,162
Stock option exercise, shares						667
Distributions to unrelated limited partners						$ (886)
Purchase of non-controlling interest						(788)
BALANCES at Mar. 26, 2019		$ 13	57,438	2,143	(26,915)	32,679
BALANCES, shares at Mar. 26, 2019		12,522,778
BALANCES at Dec. 25, 2018		$ 13	59,500	3,069	(26,465)	36,117
BALANCES, shares at Dec. 25, 2018		12,522,778
Stock-based compensation cost			109			109
Stock option exercise
Income attributable to non-controlling interests				270		270
Distributions to unrelated limited partners				(408)		(408)
Purchase of non-controlling interest			(2,171)	(788)		(2,959)
Net loss attributable to Good Times Restaurants Inc and comprehensive loss					(450)	(450)
BALANCES at Mar. 26, 2019		$ 13	$ 57,438	$ 2,143	$ (26,915)	$ 32,679
BALANCES, shares at Mar. 26, 2019		12,522,778