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CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Dec. 25, 2022
Income Statement [Abstract]
Labor, stock-based compensation		$ 475	$ 958
Selling, general, and administrative, stock-based compensation	$ 6,940	$ 6,329	$ 8,635

X

- Definition

This element represents the expense recognized in direct labor expense during the period arising from share-based compensation arrangements (for example, shares of stock, stock options or other equity instruments) with employees.

+ References

No definition available.

+ Details

Name:	rrgb_AllocatedShareBasedCompensationExpenseDirectLabor
Namespace Prefix:	rrgb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

This element represents the expense recognized in selling, general and administrative expense during the period arising from share-based compensation arrangements (for example, shares of stock, stock options or other equity instruments) with employees.

+ References

No definition available.

+ Details

Name:	rrgb_AllocatedShareBasedCompensationExpenseSellingGeneralAndAdministrativeExpense
Namespace Prefix:	rrgb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_IncomeStatementAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration