Note 4 - Supplemental Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 2025

Notes Tables

Cash, Cash Equivalent, and Investment [Table Text Block]

	December 31,
	2025		2024
Cash	$	9,345	$	6,854

Schedule of Inventory, Current [Table Text Block]

	December 31,
	2025		2024
Raw materials	$	42,150	$	36,035
Work in process	4,045			4,501
Finished products	7,813			10,827
Total	$	54,008	$	51,363

Property, Plant and Equipment [Table Text Block]

	December 31,
	2025			2024
Land	$	4,693		$	4,693
Buildings and leasehold improvements		30,179			30,109
Machinery and equipment		63,556			60,986
Furniture and fixtures		3,195			3,067
Computer hardware and software		8,164			7,990
Construction in progress		3,129			2,077
		112,916			108,922
Less: Accumulated depreciation		(72,519	)		(68,437	)
Total	$	40,397		$	40,485

Schedule of Goodwill [Table Text Block]

	Battery & Energy Products		Communications Systems		Total
Balance – January 1, 2025	$	33,513	$	11,493	$	45,006
Effect of foreign currency translation		370		-		370
Balance – December 31, 2025	$	33,883	$	11,493	$	45,376

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

	December 31, 2025
	Cost		Accumulated amortization		Net
Customer relationships	$	18,333	$	8,360	$	9,973
Patents and technology		5,762		5,635		127
Other		1,500		667		833
Trade names		-		-		-
Trademarks		-		-		-
Total other intangible assets	$	25,595	$	14,662	$	10,933

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

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

	Year ended December 31,
	2025		2024
Selling, general and administrative expense	$	1,395	$	929
Research and development expense		123		103
Total	$	1,518	$	1,032