CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Net sales	$ 33,667	$ 40,355	$ 107,525	$ 118,122
Cost of sales	24,199	27,736	77,225	82,526
Gross margin	9,468	12,619	30,300	35,596
Selling, general and administrative expense	6,119	6,074	18,155	17,644
Other operating income (expense):
Insurance recoveries	1,100	304	1,317	456
Corporate expense	2,413	3,168	9,279	9,109
Income from operations	2,036	3,681	4,183	9,299
Equity in earnings (losses) of Kronos Worldwide, Inc.	21,982	(6,229)	30,431	(13,382)
Other income (expense):
Interest and dividend income	2,716	2,344	7,945	6,454
Marketable equity securities	18,613	491	21,775	(10,468)
Loss on pension plan termination				(4,911)
Other components of net periodic pension and OPEB cost	(318)	(382)	(954)	(1,098)
Interest expense	(147)	(202)	(440)	(600)
Income (loss) before income taxes	44,882	(297)	62,940	(14,706)
Income tax expense (benefit)	8,508	(965)	10,798	(6,844)
Net income (loss)	36,374	668	52,142	(7,862)
Noncontrolling interest in net income of subsidiary	364	737	1,458	2,031
Net income (loss) attributable to NL stockholders	$ 36,010	$ (69)	$ 50,684	$ (9,893)
Amounts attributable to NL stockholders:
Net income (loss) per basic share	$ 0.74	$ 0	$ 1.04	$ (0.20)
Net income (loss) per diluted share	$ 0.74		$ 1.04	$ (0.20)
Weighted average shares outstanding - basic	48,848	48,833	48,841	48,824
Weighted average shares outstanding - diluted	48,848	48,833	48,841	48,824