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Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

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]

		2020				2019
Land		$	5,805			$	4,998
Buildings			111,876				110,162
Machinery and equipment			184,362				182,922
			302,043				298,082
Less accumulated depreciation			(193,377	)			(186,303	)
Property, plant and equipment, net		$	108,666			$	111,779

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]

		2020				2019				2018
Balance at beginning of year		$	1,438			$	1,380			$	1,098
Provision			1,350				1,747				1,689
Claims			(1,427	)			(1,689	)			(1,407	)
Balance at end of year		$	1,361			$	1,438			$	1,380

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