Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net earnings	$ 49,192	$ 73,831	$ 52,689
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	16,457	13,312	14,863
Stock-based compensation	3,740	3,486	2,382
Amortization of deferred financing costs	151	33	34
Deferred income taxes	(6,267)	(3,872)	(4,594)
Unrealized losses (gains) on foreign currency revaluation	1,456	1,356	(278)
Gains on sale/disposal of property, plant and equipment	0	(2,117)	(1,596)
Gain on sale of Czech Republic business	0	(980)	0
Other, net	2,345	(1,037)	1,195
Changes in operating assets and liabilities:
Accounts receivable	(6,817)	22,500	(20,702)
Unbilled receivables	7,800	5,451	10,031
Inventories	15,121	33,613	(36,592)
Other current assets	(2,357)	(217)	(1,210)
Other assets	5,972	2,971	7,000
Accounts payable	139	(22,745)	1,522
Accrued expenses	(7,068)	5,356	10,933
Accrued restructuring costs	215	(1,228)	6,784
Other liabilities	(5,006)	(16,388)	(4,162)
Income taxes payable	(1,009)	(4,976)	1,958
Net cash provided by operating activities	74,064	108,349	40,257
Cash flows from investing activities:
Purchase of property, plant and equipment	(14,108)	(12,126)	(8,832)
Purchases of held to maturity U.S. Treasury securities	(131,309)	(59,992)	0
Proceeds from held to maturity securities	167,907	19,918	0
Payment for equity method investment	0	(10,282)	0
Investment in related party notes receivable	(785)	(2,152)	0
Proceeds from disposal/sale of property, plant and equipment	883	6,036	1,833
Acquisition of business, net of cash acquired	(320,481)	0	0
Proceeds from sale of business	0	5,063	0
Net cash used in investing activities	(297,893)	(53,535)	(6,999)
Cash flows from financing activities:
Dividends paid to common shareholders	(3,453)	(3,492)	(3,413)
Purchase of treasury stock	(16,053)	(105)	(349)
Deferred financing costs	(1,736)	0	0
Borrowings under revolving line of credit	242,500	5,000	0
Repayments under revolving line of credit	(15,000)	(40,000)	(17,500)
Net cash provided by (used in) financing activities	206,258	(38,597)	(21,262)
Effect of exchange rate changes on cash	(3,547)	2,888	(3,486)
Net (decrease) increase in cash and cash equivalents	(21,118)	19,105	8,510
Cash and cash equivalents - beginning of year	89,371	70,266	61,756
Cash and cash equivalents - end of year	68,253	89,371	70,266
Supplemental cash flow information:
Income taxes, net of refunds received	22,952	25,056	14,618
Interest payments	5,795	4,729	3,371
Redeemable noncontrolling interest assumed in exchange for acquired net assets	72,354	0	0
ROU assets obtained in exchange for lease obligations	$ 6,870	$ 5,999	$ 8,052