CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
Net sales	$ 40,355	$ 42,864	$ 118,122	$ 126,589
Cost of sales	27,736	30,928	82,526	88,944
Gross margin	12,619	11,936	35,596	37,645
Selling, general and administrative expense	6,074	6,016	17,644	17,674
Other operating income (expense):
Corporate expense	2,864	2,704	8,653	8,680
Income from operations	3,681	3,216	9,299	11,291
Equity in earnings (losses) of Kronos Worldwide, Inc.	(6,229)	6,416	(13,382)	37,940
Other income (expense):
Interest and dividend income	2,344	1,081	6,454	1,957
Marketable equity securities	491	(24,171)	(10,468)	(4,300)
Loss on pension plan termination	0	0	(4,911)	0
Other components of net periodic pension and OPEB cost	(382)	(223)	(1,098)	(669)
Interest expense	(202)	(251)	(600)	(745)
Income (loss) before income taxes	(297)	(13,932)	(14,706)	45,474
Income tax expense (benefit)	(965)	(5,576)	(6,844)	3,564
Net income (loss)	668	(8,356)	(7,862)	41,910
Noncontrolling interest in net income of subsidiary	737	548	2,031	2,005
Net income (loss) attributable to NL stockholders	$ (69)	$ (8,904)	$ (9,893)	$ 39,905
Amounts attributable to NL stockholders:
Net income (loss) per basic share	$ 0	$ (0.18)	$ (0.20)	$ 0.82
Net income (loss) per diluted share	$ 0.00	$ (0.18)	$ 0.00	$ 0.82
Weighted average shares outstanding - basic	48,833	48,816	48,824	48,809
Weighted average shares outstanding - diluted	48,833	48,816	48,824	48,809