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Note 5 - Supplemental Balance Sheet Information (Tables)

3 Months Ended

Mar. 31, 2025

Notes Tables

Schedule of Inventory, Current [Table Text Block]

		March 31,				December 31,
		2025				2024
Raw materials		$	34,173			$	36,035
Work in process			5,190				4,501
Finished goods			8,490				10,827
Total		$	47,853			$	51,363

Property, Plant and Equipment [Table Text Block]

		March 31,				December 31,
		2025				2024
Land		$	1,273			$	4,693
Buildings and leasehold improvements			33,534				30,109
Machinery and equipment			61,533				60,986
Furniture and fixtures			3,073				3,067
Computer hardware and software			8,052				7,990
Construction in process			2,244				2,077
			109,709				108,922
Less: Accumulated depreciation			(69,432	)			(68,437	)
Property, plant and equipment, net		$	40,277			$	40,485

Schedule of Goodwill [Table Text Block]

		Battery & Energy				Communications
		Products				Systems				Total
Balance – December 31, 2024		$	33,513			$	11,493			$	45,006
Effect of foreign currency translation			135				-				135
Balance – March 31, 2025		$	33,648			$	11,493			$	45,141

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

		at March 31, 2025
						Accumulated
		Cost				Amortization				Net
Customer relationships		$	18,231			$	7,580			$	10,651
Trade names			9,954				940				9,014
Patents and technology			5,722				5,491				231
Trademarks			3,399				-				3,399
Other			1,500				610				890
Total other intangible assets		$	38,806			$	14,621			$	24,185

		at December 31, 2024
						Accumulated
		Cost				Amortization				Net
Customer relationships		$	18,154			$	7,296			$	10,858
Trade names			9,942				813				9,129
Patents and technology			5,690				5,428				262
Trademarks			3,399				-				3,399
Other			1,500				591				909
Total other intangible assets		$	38,685			$	14,128			$	24,557

Finite-Lived Intangible Assets Amortization Expense [Table Text Block]

		Three-month period ended
		March 31, 2025				March 31, 2024
Selling, general and administrative expense		$	376			$	203
Research and development expense			29				25
Total		$	405			$	228

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