Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Property, Plant and Equipment, Useful Lives [Table Text Block]

	years
Buildings	20	-	50
Machinery and equipment	5	-	15
Software	3	-	5

Property, Plant and Equipment [Table Text Block]

	2021			2020
Land	$	5,813		$	5,805
Buildings		112,760			111,876
Machinery and equipment		188,123			184,362
		306,696			302,043
Less accumulated depreciation		(202,403	)		(193,377	)
Property, plant and equipment, net	$	104,293		$	108,666

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	years
Technology and drawings	13	-	20
Customer relationships	9	-	15
Other intangibles	2	-	18

Schedule of Product Warranty Liability [Table Text Block]

	2021			2020			2019
Balance at beginning of year	$	1,361		$	1,438		$	1,380
Provision		1,813			1,350			1,747
Claims		(1,537	)		(1,427	)		(1,689	)
Balance at end of year	$	1,637		$	1,361		$	1,438