Note 5 - Goodwill, Intangible Assets and Long Term Assets (Tables)

6 Months Ended

Jun. 30, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill [Table Text Block]

	Battery & Energy Products			Communications Systems		Discontinued Operations			Total
Balance at December 31, 2011	$	4,838		$	11,493	$	2,025		$	18,356
Effect of foreign currency Translations		23			-		-			23
Balance at July 1, 2012		4,861			11,493		2,025			18,379
Sale of RedBlack Communications							(2,025	)		(2,025	)
Effect of foreign currency Translations		(10	)		-		-			(10	)
Balance at December 31, 2012		4,851			11,493		-			16,344
Effect of foreign currency translations		47			-		-			47
Balance at June 30, 2013	$	4,898		$	11,493	$	-		$	16,391

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

	June 30, 2013
	Gross Assets		Accumulated Amortization		Net
Trademarks	$	3,566	$	-	$	3,566
Patents and technology		4,505		3,822		683
Customer relationships		4,020		3,469		551
Distributor relationships		388		344		44
Non-compete agreements		218		218		-
Total intangible assets	$	12,697	$	7,853	$	4,844

	December 31, 2012
	Gross Assets		Accumulated Amortization		Net
Trademarks	$	3,564	$	-	$	3,564
Patents and technology		4,495		3,702		793
Customer relationships		3,998		3,366		632
Distributor relationships		380		330		50
Non-compete agreements		217		217		-
Total intangible assets	$	12,654	$	7,615	$	5,039