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CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Parentheticals) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 25, 2022 | Dec. 26, 2021
Income Statement [Abstract] |  |  |
Labor, stock-based compensation | $ 475 | $ 958 | $ 894
Selling, general, and administrative, stock-based compensation | 6,329 | 8,635 | 5,728
Other charges, stock-based compensation | $ (128) | $ (3,299) | $ 0

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 Allocated Share Based Compensation Expense, Other Charges + References No definition available. + Details
Name: | rrgb_AllocatedShareBasedCompensationExpenseOtherCharges
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