Equity-Based Compensation - Schedule of RSU Activity (Details) - 2024 Incentive Plan [Member] - Restricted Stock Units [Member] shares in Thousands	9 Months Ended
	Sep. 30, 2025 $ / shares shares
Schedule of RSU Activity [Line Items]
Number of Shares, Awarded \| shares	1,252
Weighted Average Grant Date Fair Value, Awarded \| $ / shares	$ 16.83
Number of Shares, Balance \| shares	1,252
Weighted Average Grant Date Fair Value, Balance \| $ / shares	$ 16.83

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

USA Rare Earth, Inc. S-1