Summary of Business and Significant Accounting Policies - Condensed Consolidated Statement of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended		12 Months Ended
	Sep. 28, 2025	Jun. 29, 2025	Mar. 30, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 28, 2025	Sep. 30, 2024	Dec. 31, 2024
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss	$ (77,497)	$ (10,332)	$ 622	$ (9,469)	$ (7,505)	$ (2,430)	$ (87,207)	$ (19,404)
Comprehensive loss	(77,511)			(9,395)			(87,111)	(19,387)
Comprehensive loss attributable to The ONE Group Hospitality, Inc.	(76,754)			(9,230)			(85,773)	(18,698)
Comprehensive loss attributable to common stockholders	$ (85,289)			(16,355)			$ (110,036)	(30,361)
Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss				(9,055)				(18,577)
Comprehensive loss				(8,981)				(18,560)
Comprehensive loss attributable to The ONE Group Hospitality, Inc.				(8,816)				(17,871)
Comprehensive loss attributable to common stockholders				(15,941)				(29,534)
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss				(414)				(827)	$ 1,300
Comprehensive loss				(414)				(827)
Comprehensive loss attributable to The ONE Group Hospitality, Inc.				(414)				(827)
Comprehensive loss attributable to common stockholders				$ (414)				$ (827)

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References + Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

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+ Details

ONE Group Hospitality, Inc. 10-Q