CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Net sales	$ 35,887	$ 36,616	$ 73,858	$ 77,767
Cost of sales	24,722	26,343	53,026	54,790
Gross margin	11,165	10,273	20,832	22,977
Selling, general and administrative expense	6,084	5,906	12,036	11,570
Other operating income (expense):
Corporate expense	4,290	2,946	6,649	5,789
Income from operations	791	1,421	2,147	5,618
Equity in earnings (losses) of Kronos Worldwide, Inc.	5,973	(2,516)	8,449	(7,153)
Other income (expense):
Interest and dividend income	2,678	2,145	5,229	4,110
Marketable equity securities	779	(5,461)	3,162	(10,959)
Loss on pension plan termination		(4,911)		(4,911)
Other components of net periodic pension and OPEB cost	(318)	(370)	(636)	(716)
Interest expense	(148)	(199)	(293)	(398)
Income (loss) before income taxes	9,755	(9,891)	18,058	(14,409)
Income tax expense (benefit)	1,302	(7,300)	2,290	(5,879)
Net income (loss)	8,453	(2,591)	15,768	(8,530)
Noncontrolling interest in net income of subsidiary	618	517	1,094	1,294
Net income (loss) attributable to NL stockholders	$ 7,835	$ (3,108)	$ 14,674	$ (9,824)
Amounts attributable to NL stockholders:
Net income (loss) per basic share	$ 0.16	$ (0.06)	$ 0.30	$ (0.20)
Net income (loss) per diluted share	$ 0.16	$ (0.06)	$ 0.30	$ (0.20)
Weighted average shares outstanding - basic	48,841	48,824	48,837	48,820
Weighted average shares outstanding - diluted	48,841	48,824	48,837	48,820