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Note 5 - Supplemental Balance Sheet Information (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Schedule of Inventory, Current [Table Text Block]

		September 30,				December 31,
		2025				2024
Raw materials		$	38,242			$	36,035
Work in process		3,568					4,501
Finished goods		10,937					10,827
Total		$	52,747			$	51,363

Property, Plant and Equipment [Table Text Block]

		September 30,				December 31,
		2025				2024
Land		$	4,693			$	4,693
Buildings and leasehold improvements		30,162					30,109
Machinery and equipment		62,282					60,986
Furniture and fixtures		3,129					3,067
Computer hardware and software		8,161					7,990
Construction in process		3,578					2,077
		112,005					108,922
Less: Accumulated depreciation		(71,469)					(68,437	)
Property, plant and equipment, net		$	40,536			$	40,485

Schedule of Depreciation Expense [Table Text Block]

		Three-month period ended								Nine-month period ended
		September 30,				September 30,				September 30,				September 30,
		2025				2024				2025				2024
Depreciation expense		$	1,008			$	765			$	2,966			$	2,294

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			330				-				330
Balance – September 30, 2025		$	33,843			$	11,493			$	45,336

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

		at September 30, 2025
						Accumulated
		Cost				Amortization				Net
Customer relationships		$	18,330			$	8,119			$	10,211
Trade names			9,968				1,187				8,781
Patents and technology			5,761				5,598				163
Trademarks			3,400				-				3,400
Other			1,500				648				852
Total other intangible assets		$	38,959			$	15,552			$	23,407

		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								Nine-month period ended
		September 30,				September 30,				September 30,				September 30,
		2025				2024				2025				2024
Amortization included in:
Selling, general and administrative		$	380			$	204			$	1,134			$	609
Research and development			31				25				92				75
Total amortization expense		$	411			$	229			$	1,226			$	684

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