CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 167,453	$ 111,522
Restricted cash and cash equivalents	2,896	2,917
Marketable securities	11,934	53,149
Accounts and other receivables, net	15,654	17,101
Receivables from affiliates	179	628
Inventories, net	27,363	30,712
Prepaid expenses and other	1,878	2,235
Total current assets	227,357	218,264
Other assets:
Restricted cash and cash equivalents	27,231	26,943
Note receivable from affiliate	9,200	10,600
Marketable securities	21,356	18,194
Investment in Kronos Worldwide, Inc.	237,268	247,582
Goodwill	27,156	27,156
Other assets, net	5,721	2,060
Total other assets	327,932	332,535
Property and equipment:
Land	5,390	5,390
Buildings	23,262	23,239
Equipment	74,651	74,315
Construction in progress	770	676
Property and equipment, gross	104,073	103,620
Less accumulated depreciation	79,336	77,757
Net property and equipment	24,737	25,863
Total assets	580,026	576,662
Current liabilities:
Accounts payable	3,791	3,148
Accrued litigation settlement	11,943	11,830
Accrued and other current liabilities	10,681	13,182
Accrued environmental remediation and related costs	2,511	1,655
Payables to affiliates	635	634
Total current liabilities	29,561	30,449
Noncurrent liabilities:
Long-term debt from affiliate	500	500
Accrued environmental remediation and related costs	89,280	89,451
Long-term litigation settlement	16,276	16,122
Deferred income taxes	42,877	41,733
Accrued pension costs	1,249	1,571
Other	5,067	5,074
Total noncurrent liabilities	155,249	154,451
NL stockholders' equity:
Preferred stock
Common stock	6,105	6,103
Additional paid-in capital	299,099	298,868
Retained earnings	291,322	284,462
Accumulated other comprehensive loss	(223,434)	(219,621)
Total NL stockholders' equity	373,092	369,812
Noncontrolling interest in subsidiary	22,124	21,950
Total equity	395,216	391,762
Total liabilities and equity	580,026	576,662
Commitments and contingencies (Notes 11 and 13)