Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current Assets:
Cash and cash equivalents	$ 84,976	$ 89,371
Held to maturity U.S. Treasury securities	58,822	37,548
Accounts receivable, net of allowance of $1,305 and $1,388, respectively	81,153	84,129
Inventories	127,931	136,540
Unbilled receivables	5,906	12,793
Other current assets	17,233	21,097
Total current assets	376,021	381,478
Property, plant and equipment, net	35,082	36,533
Right-of-use assets	21,945	20,481
Equity method investment	9,943	10,282
Intangible assets, net	46,715	49,391
Goodwill, net	25,415	26,642
Deferred income taxes	14,525	11,553
Other assets	35,173	33,119
Total assets	567,604	571,631
Current Liabilities:
Accounts payable	36,415	40,441
Accrued expenses	38,916	54,657
Operating lease liabilities, current	5,992	6,350
Other current liabilities	8,432	9,161
Total current liabilities	89,755	110,609
Long-term Liabilities:
Long-term debt	60,000	60,000
Operating lease liabilities, long-term	16,131	14,212
Liability for uncertain tax positions	17,953	19,823
Minimum pension obligation and unfunded pension liability	20,307	19,876
Deferred income taxes	1,626	1,456
Other long-term liabilities	5,417	5,097
Total liabilities	211,189	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 23,923 Class A shares and 232,242 Class B shares)	(14,629)	(454)
Additional paid-in capital	46,054	44,260
Retained earnings	340,462	307,510
Accumulated other comprehensive loss	(16,732)	(12,037)
Total stockholders' equity	356,415	340,558
Total liabilities and stockholders' equity	567,604	571,631
Common Class A [Member]
Stockholders' Equity:
Common stock	212	214
Common Class B [Member]
Stockholders' Equity:
Common stock	1,048	1,065
Related Party [Member]
Current Assets:
Related party note receivable	$ 2,785	$ 2,152

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2