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CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 30, 2018 | Dec. 31, 2017 | Dec. 25, 2016
Income Statement [Abstract] |  |  |
Labor, stock-based compensation | $ 245 | $ 346 | $ 181
Selling, general, and administrative expenses, stock-based compensation | $ 3,803 | $ 4,442 | $ 4,364

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