XML 10 R5.htm IDEA: XBRL DOCUMENT
v3.25.1

Unaudited Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Apr. 01, 2025 | Apr. 02, 2024
Income Statement [Abstract] |  |
Related party net loss related to equity method investment | $ 158,000 | $ 147,000

X
- Definition Related party net cost related to equity method investment. + References No definition available. + Details
Name: | bjri_RelatedPartyNetCostRelatedToEquityMethodInvestment
Namespace Prefix: | bjri_
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