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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Current assets:    
Cash and cash equivalents $ 101,923 $ 163,154
Restricted cash and cash equivalents 21,272 20,545
Accounts and other receivables, net 18,138 23,739
Inventories, net 30,951 28,366
Prepaid expenses and other 2,016 2,154
Total current assets 174,300 237,958
Other assets:    
Restricted cash and cash equivalents 375 491
Note receivable from affiliate 8,100 9,300
Marketable securities 18,900 28,015
Investment in Kronos Worldwide, Inc. 246,496 250,278
Goodwill 27,156 27,156
Other assets, net 893 1,034
Total other assets 301,920 316,274
Property and equipment:    
Land 5,390 5,390
Buildings 23,272 23,262
Equipment 77,757 75,605
Construction in progress 540 589
Property and equipment, gross 106,959 104,846
Less accumulated depreciation 82,977 80,820
Net property and equipment 23,982 24,026
Total assets 500,202 578,258
Current liabilities:    
Accounts payable 3,246 3,758
Accrued litigation settlement 16,667 16,431
Accrued and other current liabilities 11,645 12,032
Accrued environmental remediation and related costs 2,666 58,135
Payables to affiliates 950 706
Total current liabilities 35,174 91,062
Noncurrent liabilities:    
Long-term debt from affiliate 500 500
Accrued environmental remediation and related costs 10,469 11,143
Deferred income taxes 59,430 53,391
Accrued pension costs 78 76
Other 1,279 6,183
Total noncurrent liabilities 71,756 71,293
NL stockholders' equity:    
Preferred stock
Common stock 6,107 6,105
Additional paid-in capital 299,349 299,099
Retained earnings 284,754 315,056
Accumulated other comprehensive loss (214,833) (223,356)
Total NL stockholders' equity 375,377 396,904
Noncontrolling interest in subsidiary 17,895 18,999
Total equity 393,272 415,903
Total liabilities and equity 500,202 578,258
Commitments and contingencies (Notes 13 and 15)