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v3.24.1

Summary of Significant Accounting Policies - Shipping and Handling Costs (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Selling, General and Administrative Expense [Abstract] |  |
Shipping and handling expense | $ 711,640 | $ 842,827

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- Definition Selling, General and Administrative Expense, Shipping and Handling Costs + References No definition available. + Details
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Namespace Prefix: | fgi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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