Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Current Assets:
Cash and cash equivalents	$ 65,927	$ 68,253
Held to maturity U.S. Treasury securities	950	950
Accounts receivable, net of credit losses of $1,380 and $1,336, respectively	103,643	111,376
Inventories	164,815	161,370
Unbilled receivables	5,594	4,994
Assets held for sale	1,849	2,062
Other current assets	25,647	24,525
Total current assets	368,425	373,530
Property, plant and equipment, net	47,271	47,879
Right-of-use assets	24,962	25,125
Equity method investment	9,856	9,265
Intangible assets, net	228,391	231,948
Goodwill, net	208,047	208,036
Deferred income taxes	17,024	16,430
Other Assets, Noncurrent	33,210	34,639
Total assets	940,456	949,789
Current Liabilities:
Accounts payable	46,110	49,182
Accrued expenses	37,784	53,031
Operating lease liabilities, current	8,540	7,954
Other current liabilities	18,801	17,902
Total current liabilities	111,235	128,069
Long-term Liabilities:
Long-term debt	280,000	287,500
Operating lease liabilities, long-term	17,349	17,763
Liability for uncertain tax positions	18,337	18,127
Minimum pension obligation and unfunded pension liability	18,490	18,431
Deferred income taxes	27,060	28,916
Other Liabilities, Noncurrent	5,055	4,826
Total liabilities	482,521	508,627
Commitments and contingencies (see Note 15)
Redeemable noncontrolling interest	81,034	80,586
Stockholders' Equity:
Preferred stock, no par value, 1,000,000 shares authorized; none issued	0	0
Additional paid-in capital	32,680	31,514
Retained earnings	362,041	345,031
Accumulated other comprehensive loss	(19,091)	(17,227)
Total stockholders' equity	376,901	360,576
Total liabilities and stockholders' equity	940,456	949,789
Common Class A [Member]
Stockholders' Equity:
Class A common stock, par value $.10 per share, 10,000,000 shares authorized; 2,115,263 shares outstanding at each date (net of 1,072,769 restricted treasury shares)	212	212
Common Class B [Member]
Stockholders' Equity:
Class A common stock, par value $.10 per share, 10,000,000 shares authorized; 2,115,263 shares outstanding at each date (net of 1,072,769 restricted treasury shares)	1,059	1,046
Related Party [Member]
Current Assets:
Related party note receivable	3,270	2,937
Long-term Liabilities:
Related-party note payable	$ 4,995	$ 4,995