Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	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		417			417
Restricted stock unit vesting
Restricted stock unit vesting, shares	44,485
Stock option exercise		29			$ 29
Stock option exercise, shares	9,397				9,397
Income attributable to non-controlling interests			1,017		$ 1,017
Distributions to unrelated limited partners			(1,425)		(1,425)
Contributions from unrelated limited partners			933		933
Net loss attributable to Good Times Restaurants Inc and comprehensive loss	$ 0	0	0	(1,034)	(1,034)
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		719			719
Restricted stock unit vesting	$ 1				1
Restricted stock unit vesting, shares	59,253
Stock option exercise		3			$ 3
Stock option exercise, shares	667				667
Income attributable to non-controlling interests			889		$ 889
Distributions to unrelated limited partners			(1,817)		(1,817)
Contributions from unrelated limited partners			20		20
Purchase of non-controlling interest		(2,171)	(788)		(2,959)
Net loss attributable to Good Times Restaurants Inc and comprehensive loss	$ 0	0	0	(5,137)	(5,137)
BALANCES at Sep. 24, 2019	$ 13	$ 57,936	$ 1,522	$ (30,551)	$ 28,920
BALANCES, shares at Sep. 24, 2019	12,541,082