Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2026

The change in our investments for the three months ended March 31, 2026 and March 31, 2025 are as follows:


	Three Months Ended March 31, 2026
	Fair Value Measurements Using
	Quoted Prices in Active Markets for Identical Assets or Liabilities		Significant Unobservable Inputs
	(Level 1)		(Level 3)		Total
	(in thousands)
Investment balance at beginning of period	$	3,576	$	8,251	$	11,827



Unrealized (loss) gain on equity securities	(848)		129		(719)
Unrealized gain on embedded option	—		1,381		1,381
Unrealized loss on convertible note, excluding embedded option	—		(995)		(995)
Investment balance at end of period	$	2,728	$	8,766	$	11,494


	Three Months Ended March 31, 2025
	Fair Value Measurements Using
	Quoted Prices in Active Markets for Identical Assets or Liabilities		Significant Other Observable Inputs		Significant Unobservable Inputs
	(Level 1)		(Level 2)		(Level 3)		Total
	(in thousands)
Investment balance at beginning of period	$	19,561	$	1,388	$	7,210	$	28,159

Sale of investments	(19,011)		—		—		(19,011)
Reclassification between Level 2 and Level 3 fair value	—		(1,388)		1,388		—
Gain on equity securities	466		—		—		466
Unrealized loss on embedded option	—		—		(209)		(209)
Unrealized gain on convertible note, excluding embedded option	—		—		281		281
Investment balance at end of period	$	1,016	$	—	$	8,670	$	9,686

Schedule of Recurring Fair Value Measurements

Recurring fair value measurements by valuation hierarchy as of March 31, 2026 and December 31, 2025 are as follows:


			Fair Value Measurements Using
	Total as of		Quoted Prices in Active Markets for Identical Assets or Liabilities		Significant Unobservable Inputs
Description	March 31, 2026		(Level 1)		(Level 3)
	(in thousands)

Investment in Standard Lithium	$	2,728	$	2,728	$	—
Other investments	8,766		—		8,766

Total investments	$	11,494


			Fair Value Measurements Using
	Total as of		Quoted Prices in Active Markets for Identical Assets or Liabilities		Significant Unobservable Inputs
Description	December 31, 2025		(Level 1)		(Level 3)
	(in thousands)

Investment in Standard Lithium	$	3,576	$	3,576	$	—
Other investments	8,251		—		8,251

Total investments	$	11,827

- Definition

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

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