Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2025

Fair Value Disclosures [Abstract]

Schedule of changes in Investments

The change in our investments for the three-month periods ended March 31, 2025 and March 31, 2024 are as follows:

	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		—
Unrealized 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

	Three Months Ended March 31, 2024
	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	$	10,154	$	7,200	$	17,354
Unrealized gain on equity securities	2,994		—		2,994
Unrealized loss on embedded option	—		(199)		(199)
Unrealized gain on convertible note, excluding embedded option	—		237		237
Investment balance at end of period	$	13,148	$	7,238	$	20,386

Schedule of Recurring Fair Value Measurements

Recurring fair value measurements by valuation hierarchy as of March 31, 2025 and December 31, 2024 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, 2025		(Level 1)		(Level 3)
	(in thousands)
Investment in Standard Lithium	$	1,016	$	1,016	$	—
Other investments	8,670		—		8,670
Total investments	$	9,686

			Fair Value Measurements Using
	Total as of		Quoted Prices in Active Markets for Identical Assets or Liabilities		Significant Other Observable Inputs		Significant Unobservable Inputs
Description	December 31, 2024		(Level 1)		(Level 2)		(Level 3)
	(in thousands)
Investment in Kodiak	$	18,393	$	18,393	$	—	$	—
Investment in Standard Lithium	1,168		1,168		—		—
Other investments	8,598		—		1,388		7,210
Investments	$	28,159