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INTANGIBLE ASSETS (Details Textual) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Goodwill and Intangible Assets Disclosure [Abstract] |  |
Intangible assets, accumulated amortization | $ 53.1 | $ 49.3

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- Definition Intangible Assets, Accumulated Amortization + References No definition available. + Details
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Namespace Prefix: | bgsf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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