Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 89,371	$ 70,266
Held to maturity U.S. Treasury securities	37,548	0
Accounts receivable, net of allowance of $1,388 and $1,552, at December 31, 2023 and 2022, respectively	84,129	107,274
Inventories	136,540	172,465
Unbilled receivables	12,793	18,244
Other current assets	21,097	13,159
Total current assets	381,478	381,408
Property, plant and equipment, net	36,533	36,833
Right-of-use assets	20,481	21,551
Equity method investment	10,282	0
Intangible assets, net	49,391	54,111
Goodwill, net	26,642	25,099
Deferred income taxes	11,553	7,281
Other assets	33,119	34,183
Total assets	571,631	560,466
Current liabilities:
Accounts payable	40,441	64,589
Accrued expenses	54,657	50,873
Operating lease liability, current	6,350	5,870
Other current liabilities	9,161	14,972
Total current liabilities	110,609	136,304
Long-term liabilities:
Long-term debt	60,000	95,000
Operating lease liability, long-term	14,212	15,742
Liability for uncertain tax positions	19,823	24,798
Minimum pension obligation and unfunded pension liability	19,876	18,522
Deferred income taxes	1,456	1,257
Other long-term liabilities	5,097	6,497
Total liabilities	231,073	298,120
Commitments and contingencies (see Note 19)
Stockholders' equity:
Preferred stock, no par value, 1,000,000 shares authorized; none issued	0	0
Treasury stock (unrestricted, consisting of 3,323 Class A shares and 17,342 Class B shares)	(454)	(349)
Additional paid-in capital	44,260	40,772
Retained earnings	307,510	237,188
Accumulated other comprehensive loss	(12,037)	(16,546)
Total stockholders' equity	340,558	262,346
Total liabilities and stockholders' equity	571,631	560,466
Common Class A [Member]
Stockholders' equity:
Common Stock	214	214
Common Class B [Member]
Stockholders' equity:
Common Stock	1,065	1,067
Related Party [Member]
Current assets:
Related-party note receivable	$ 2,152	$ 0