Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Net sales:
Net sales	$ 97,904	$ 108,933	$ 201,035	$ 208,159
Total net sales	102,918	113,104	211,245	217,369
Operating costs and expenses:
Costs of products sold (excluding depreciation and amortization)	80,675	91,981	167,430	174,085
Selling and administrative	12,917	12,968	26,801	26,627
Depreciation and amortization	4,226	5,368	8,484	10,004
Deconsolidation Charge (Note 2)			875
Severance charge (Note 2)		5,854		5,854
Loss on disposal of assets	28	11	21	27
Total operating costs and expenses	97,846	116,182	203,611	216,597
Income (loss) from operations	5,072	(3,078)	7,634	772
Other expense - net:
Interest expense	(2,791)	(2,825)	(5,514)	(5,551)
Other income (expense) - net	545	(225)	1,141	601
Total other expense - net	(2,246)	(3,050)	(4,373)	(4,950)
Income (loss) before income taxes	2,826	(6,128)	3,261	(4,178)
Income tax provision	(677)	(592)	(1,262)	(651)
Net income (loss)	2,149	(6,720)	1,999	(4,829)
Less: Net income attributable to noncontrolling interest	660	615	1,377	1,364
Net income (loss) attributable to Ampco-Pittsburgh	$ 1,489	$ (7,335)	$ 622	$ (6,193)
Net income (loss) per share attributable to Ampco-Pittsburgh common shareholders:
Basic	$ 0.07	$ (0.36)	$ 0.03	$ (0.31)
Diluted	$ 0.07	$ (0.36)	$ 0.03	$ (0.31)
Weighted-average number of common shares outstanding:
Basic	20,432	20,108	20,335	20,044
Diluted	21,437	20,108	21,369	20,044
Related Party [Member]
Net sales:
Net sales to related parties	$ 5,014	$ 4,171	$ 10,210	$ 9,210