Accounts Receivable, Net - Accrued Defective Return and Discount Accounts Roll Forward (Details) - USD ($)	9 Months Ended	12 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Receivables [Abstract]
Beginning balance	$ 3,292,101	$ 1,218,110	$ 1,218,110
Addition (Provision)	(1,456,022)	$ 2,133,028	2,073,991
Ending balance	$ 1,836,079		$ 3,292,101

The amount as of the balance sheet date of accrued defective return and discount on accounts receivables, classified as current.

No definition available.

Name:	fgi_AccountsReceivableAccruedDefectiveReturnAndDiscountCurrent
Namespace Prefix:	fgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant