Nature of business and organization - Reorganization - General Information (Details)	Jan. 27, 2022	Dec. 31, 2024
Noncontrolling Interest [Line Items]
Percentage of outstanding stock expected to be distributed (as a percent)	100.00%
Percentage of outstanding stock expected to be contributed (as a percent)	100.00%
FGI Industries Ltd.
Noncontrolling Interest [Line Items]
Ownership percentage (as a percent)	100.00%
FGI Europe Investment Limited
Noncontrolling Interest [Line Items]
Ownership percentage (as a percent)	100.00%	100.00%
FGI International, Limited
Noncontrolling Interest [Line Items]
Ownership percentage (as a percent)	100.00%	100.00%
Foremost Groups Ltd. | FGI Industries Ltd.
Noncontrolling Interest [Line Items]
Ownership percentage (as a percent)	100.00%
Foremost Groups Ltd. | Foremost Australasia Pty Ltd
Noncontrolling Interest [Line Items]
Ownership percentage (as a percent)	100.00%
Foremost Australasia Pty Ltd | Foremost Kingbetter Food Equipment Inc.
Noncontrolling Interest [Line Items]
Ownership percentage (as a percent)	100.00%