Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Cash flows from operating activities:
Net income (loss)	$ 2,351	$ (38,119)
Adjustments to reconcile net income (loss) from operations to net cash flows used from operating activities
Depreciation and amortization	18,611	17,674
(Credit) charge for asbestos-related costs, net	(4,101)	40,887
Deferred income tax provision (benefit)	259	(2,964)
Difference between net periodic pension and other postretirement costs and contributions	(11,434)	(6,541)
Stock-based compensation	1,478	2,146
Non-cash provisions – net	253	(64)
Sale-leaseback accretion	1,254	1,163
Other – net	443	(359)
Changes in assets/liabilities:
Receivables	6,148	(5,473)
Inventories	4,762	(1,401)
Contract assets	(4,150)	479
Other assets	(3,248)	283
Insurance receivable – asbestos	18,037	12,780
Asbestos liability	(24,574)	(23,374)
Accounts payable	(104)	(6,358)
Accrued payrolls and employee benefits	2,859	2,740
Customer-related liabilities	6,169	2,828
Other liabilities	3,015	(13)
Net cash flows provided by (used in) operating activities	18,028	(3,686)
Cash flows from investing activities:
Purchases of property, plant and equipment	(12,194)	(20,448)
Proceeds from government grant, for purchase of equipment	3,301
Proceeds from sale of property, plant and equipment	10	128
Purchases of long-term marketable securities	(372)	(99)
Proceeds from sale of long-term marketable securities	1,010	734
Net cash flows used in investing activities	(8,245)	(19,685)
Cash flows from financing activities:
Proceeds from revolving credit facility	23,964	32,595
Payments on revolving credit facility	(23,964)	(23,673)
Proceeds from sale-leaseback financing arrangements		2,500
Payments on sale-leaseback financing arrangements	(372)	(268)
Proceeds from equipment financing facility	1,692	10,331
Payments on equipment financing facility	(1,629)
Proceeds from related party debt		1,768
Repayment of related party debt	(664)	(1,096)
Repayment of debt	(380)	(469)
Net cash flows (used in) provided by financing activities	(1,353)	21,688
Effect of exchange rate changes on cash and cash equivalents	(289)	234
Net increase (decrease) in cash and cash equivalents	8,141	(1,449)
Cash and cash equivalents at beginning of year	7,286	8,735
Cash and cash equivalents at end of year	15,427	7,286
Supplemental disclosures of cash flow information:
Income tax payments (net of refunds)	2,511	2,335
Interest payments (net of amounts capitalized)	10,167	7,921
Non-cash investing and financing activities:
Purchases of property, plant and equipment in accounts payable	1,083	461
Finance lease right-of-use assets exchanged for lease liabilities	148	199
Operating lease right-of-use assets exchanged for lease liabilities	$ 694	$ 1,956