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Note 6 - Segment Information (Details Textual) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2024
Number of Operating Segments	2		2
Share-Based Payment Arrangement, Noncash Expense	$ 2,717	$ 2,964
Interest Income, Operating and Nonoperating	200	100
Mineral Rights Segment [Member]
Share-Based Payment Arrangement, Noncash Expense	300	400
Cash Compensation	100	100
Corporate & Financing Segment [Member]
Share-Based Payment Arrangement, Noncash Expense	2,200	2,300
Cash Compensation	$ 100	$ 100
Sisecam Wyoming [Member]
Equity Method Investment, Ownership Percentage	49.00%		49.00%

X

- Definition

The amount of cash compensation.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of interest income classified as operating and nonoperating.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Amount of noncash expense for share-based payment arrangement.

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