Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2026

Segment Reporting [Abstract]

Schedule of Long - Lived Assets and Geographic Region

The following table summarizes the Company's long-lived assets, which includes mineral interests by geographic region as of March 31, 2026 and December 31, 2025:


		March 31, 2026				December 31, 2025
United States		$	23,858			$	23,688
Brazil			39				29
Total Long-lived assets		$	23,897			$	23,717

Schedule of Segment Expense and Reconciled to Net Loss Before Taxes

Significant segment expense included in the measure of segment profit or loss are shown below and reconciled to net loss before taxes for three months ended March 31, 2026 and 2025:


For the three months ended March 31, 2026		United States Mining Operations				Brazil Mining Operations				Total
Operating expenses:
Exploration expenses		$	1,865			$	200			$	2,065
General and administrative expenses			13				323				336
Depreciation expense			22				1				23
Segment operating loss		$	(1,900	)		$	(524	)		$	(2,424	)
Corporate and other expenses											2,380
Interest income											127
Interest expense											45
Foreign exchange loss											4
Change in fair value of SAFE											(3,409	)
Change in fair value of warrants											(8,646	)
Loss before income taxes										$	(16,781	)


For the three months ended March 31, 2025		United States Mining Operations				Brazil Mining Operations				Total
Operating expenses:
Exploration expenses		$	—			$	50			$	50
General and administrative expenses			—				112				112
Depreciation expense			—				1				1
Segment operating loss		$	—			$	(163	)		$	(163	)
Corporate and other expenses											137
Interest expense											1
Loss before income taxes										$	(301	)