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ACCRUED PAYROLL AND EXPENSES AND CONTINGENT CONSIDERATION - Schedule of Future Estimated Earnout Payments (Details) | Jan. 01, 2023 USD ($)
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Accrued Liabilities, Current [Abstract] |
Estimated cash payment, less than one year | $ 1,110,000
Discount, less than one year | 28,940
Net, less than one year | $ 1,081,060

X
- Definition Business Combination, Contingent Consideration, Liability, Noncurrent, Less Than One Year + References No definition available. + Details
Name: | bgsf_BusinessCombinationContingentConsiderationLiabilityNoncurrentLessThanOneYear
Namespace Prefix: | bgsf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Business Combination, Contingent Consideration Payment In Less Than One Year + References No definition available. + Details
Name: | bgsf_BusinessCombinationContingentConsiderationPaymentInLessThanOneYear
Namespace Prefix: | bgsf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Interest Expense, Earn Out Payable In Less Than One Year + References No definition available. + Details
Name: | bgsf_InterestExpenseEarnOutPayableInLessThanOneYear
Namespace Prefix: | bgsf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_AccruedLiabilitiesCurrentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration