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Note 5 - Supplemental Balance Sheet Information (Tables)

6 Months Ended

Jun. 30, 2025

Notes Tables

Schedule of Inventory, Current [Table Text Block]

		June 30,				December 31,
		2025				2024
Raw materials		$	35,502			$	36,035
Work in process			5,639				4,501
Finished goods			9,434				10,827
Total		$	50,575			$	51,363

Property, Plant and Equipment [Table Text Block]

		June 30,				December 31,
		2025				2024
Land		$	4,693			$	4,693
Buildings and leasehold improvements			30,124				30,109
Machinery and equipment			62,012				60,986
Furniture and fixtures			3,108				3,067
Computer hardware and software			8,090				7,990
Construction in process			3,122				2,077
			111,149				108,922
Less: Accumulated depreciation			(70,535	)			(68,437	)
Property, plant and equipment, net		$	40,614			$	40,485

Schedule of Depreciation Expense [Table Text Block]

		Three-month period ended								Six-month period ended
		June 30,				June 30,				June 30,				June 30,
		2025				2024				2025				2024
Depreciation expense		$	1,008			$	789			$	1,958			$	1,529

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			400				-				400
Balance – June 30, 2025		$	33,913			$	11,493			$	45,406

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

		at June 30, 2025
						Accumulated
		Cost				Amortization				Net
Customer relationships		$	18,383			$	7,913			$	10,470
Trade names			9,976				1,078				8,898
Patents and technology			5,783				5,583				200
Trademarks			3,400				-				3,400
Other			1,500				629				871
Total other intangible assets		$	39,042			$	15,203			$	23,839

		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								Six-month period ended
		June 30,				June 30,				June 30,				June 30,
		2025				2024				2025				2024
Amortization included in:
Selling, general and administrative		$	378			$	202			$	754			$	405
Research and development			32				25				61				50
Total amortization expense		$	410			$	227			$	815			$	455

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