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Note 5 - Supplemental Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 2015

Dec. 31, 2014

Note 5 - Supplemental Balance Sheet Information

Inventory

		December 31,
		2015				2014
Raw materials		$	11,602			$	15,100
Work in process			1,560				1,489
Finished products			10,652				9,497
Total		$	23,814			$	26,086

Major classes of property, plant and equipment

		December 31,
		2015				2014
Land		$	123			$	123
Buildings and leasehold improvements			7,490				7,437
Machinery and equipment			49,609				48,054
Furniture and fixtures			1,974				1,811
Computer hardware and software			4,585				4,452
Construction in progress			745				1,351
			64,526				63,228
Less – Accumulated depreciation			(55,488	)			(53,416	)
Total		$	9,038			$	9,812

Goodwill activity by segment

		Battery & Energy Products				Communi- cations Systems				Total
Balance – January 1, 2014		$	4,926			$	11,493			$	16,419
Effect of foreign currency translation			(12	)			—				(12	)
Balance – December 31, 2014			4,914				11,493				16,407
Effect of foreign currency translation			(124	)			—				(124	)
Balance – December 31, 2015		$	4,790			$	11,493			$	16,283

Composition of intangible assets

		December 31, 2015
		Cost				Accumulated Amortization				Net
Trademarks		$	3,411			$	—			$	3,411
Patents and technology			4,482				4,217				265
Customer relationships			3,971				3,716				255
Distributor relationships			370				355				15
Total other intangible assets		$	12,234			$	8,288			$	3,946

		December 31, 2014
		Cost				Accumulated Amortization				Net
Trademarks		$	3,567			$	—			$	3,567
Patents and technology			4,509				4,114				395
Customer relationships			4,029				3,679				350
Distributor relationships			391				365				26
Total other intangible assets		$	12,496			$	8,158			$	4,338

Amortization of intangible assets

		Year ended December 31,
		2015				2014
Research and development expense		$	130			$	176
Selling, general and administrative expense			105				129
Total		$	235			$	305

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