Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 70,266	$ 61,756
Accounts receivable, net of allowance for doubtful accounts of $1,552 and $1,536, at December 31, 2022 and 2021, respectively	107,274	87,135
Inventories	172,465	139,383
Unbilled receivables	18,244	28,275
Other current assets	13,159	12,467
Total current assets	381,408	329,016
Property, plant and equipment, net	36,833	38,210
Right-of-use assets	21,551	21,252
Intangible assets, net	54,111	60,995
Goodwill, net	25,099	26,651
Deferred income taxes	7,281	4,461
Other assets	34,183	31,261
Total assets	560,466	511,846
Current liabilities:
Accounts payable	64,589	65,960
Accrued expenses	50,873	34,453
Operating lease liability, current	5,870	6,880
Other current liabilities	14,972	4,719
Total current liabilities	136,304	112,012
Long-term liabilities:
Long-term debt	95,000	112,500
Operating lease liability, long-term	15,742	14,668
Liability for uncertain tax positions	24,798	28,434
Minimum pension obligation and unfunded pension liability	18,522	23,909
Deferred income taxes	1,257	1,487
Other long-term liabilities	6,497	10,093
Total liabilities	298,120	303,103
Commitments and contingencies (see Note 18)
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)	(349)	0
Additional paid-in capital	40,772	38,419
Retained earnings	237,188	187,935
Accumulated other comprehensive loss	(16,546)	(18,863)
Total stockholders' equity	262,346	208,743
Total liabilities and stockholders' equity	560,466	511,846
Common Class A [Member]
Stockholders' equity:
Common stock	214	214
Common Class B [Member]
Stockholders' equity:
Common stock	$ 1,067	$ 1,038