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Note 5 - Goodwill, Intangible Assets and Long Term Assets (Tables) | 6 Months Ended
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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 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13854-109267 + Details
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