Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current Assets:
Cash and cash equivalents	$ 134,266	$ 89,371
Held to maturity U.S. Treasury securities	29,541	37,548
Accounts receivable, net of credit losses of $1,164 and $1,388, respectively	75,998	84,129
Inventories	124,885	136,540
Unbilled receivables	5,312	12,793
Assets held for sale	2,061	0
Other current assets	15,586	21,097
Total current assets	387,649	381,478
Property, plant and equipment, net	36,735	36,533
Right-of-use assets	22,901	20,481
Equity method investment	10,014	10,282
Intangible assets, net	45,850	49,391
Goodwill, net	26,922	26,642
Deferred income taxes	16,612	11,553
Other assets	34,664	33,119
Total assets	584,417	571,631
Current Liabilities:
Accounts payable	37,139	40,441
Accrued expenses	42,109	54,657
Operating lease liabilities, current	6,451	6,350
Other current liabilities	11,188	9,161
Total current liabilities	96,887	110,609
Long-term Liabilities:
Long-term debt	60,000	60,000
Operating lease liabilities, long-term	16,808	14,212
Liability for uncertain tax positions	18,225	19,823
Minimum pension obligation and unfunded pension liability	20,268	19,876
Deferred income taxes	1,320	1,456
Other long-term liabilities	3,547	5,097
Total liabilities	217,055	231,073
Commitments and contingencies (see Note 15)
Stockholders' Equity:
Preferred stock, no par value, 1,000,000 shares authorized; none issued	0	0
Treasury stock (unrestricted, consisting of 29,649 Class A shares and 253,163 Class B shares)	(16,507)	(454)
Additional paid-in capital	47,064	44,260
Retained earnings	347,702	307,510
Accumulated other comprehensive loss	(12,155)	(12,037)
Total stockholders' equity	367,362	340,558
Total liabilities and stockholders' equity	584,417	571,631
Common Class A [Member]
Stockholders' Equity:
Common stock	212	214
Common Class B [Member]
Stockholders' Equity:
Common stock	1,046	1,065
Related Party [Member]
Current Assets:
Related party note receivable	$ 3,070	$ 2,152