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Note 5 - Goodwill and Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2012
Schedule of Goodwill [Table Text Block] |
|  | Battery & Energy Products |  |  | Communications Systems |  |  | Discontinued Operations |  |  | Total |
Balance at December 31, 2010 |  | $ | 4,758 |  |  | $ | 11,493 |  |  | $ | 2,025 |  |  | $ | 18,276 |
Effect of foreign currency translations |  |  | 73 |  |  |  | - |  |  |  | - |  |  |  | 73 |
Balance at October 2, 2011 |  |  | 4,831 |  |  |  | 11,493 |  |  |  | 2,025 |  |  |  | 18,349 |
Effect of foreign currency translations |  |  | 7 |  |  |  | - |  |  |  | - |  |  |  | 7 |
Balance at December 31, 2011 |  |  | 4,838 |  |  |  | 11,493 |  |  |  | 2,025 |  |  |  | 18,356 |
Sale of RedBlack Communications |  |  |  |  |  |  |  |  |  |  | (2,025 | ) |  |  | (2,025 | )
Effect of foreign currency translations |  |  | 6 |  |  |  | - |  |  |  | - |  |  |  | 6 |
Balance at September 30, 2012 |  | $ | 4,844 |  |  | $ | 11,493 |  |  | $ | - |  |  | $ | 16,337 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | September 30, 2012 |
|  | Gross Assets |  |  | Accumulated Amortization |  |  | Net |
Trademarks |  | $ | 3,564 |  |  | $ | - |  |  | $ | 3,564 |
Patents and technology |  |  | 4,493 |  |  |  | 3,635 |  |  |  | 858 |
Customer relationships |  |  | 3,995 |  |  |  | 3,308 |  |  |  | 687 |
Distributor relationships |  |  | 379 |  |  |  | 324 |  |  |  | 55 |
Non-compete agreements |  |  | 216 |  |  |  | 216 |  |  |  | - |
Total intangible assets |  | $ | 12,647 |  |  | $ | 7,483 |  |  | $ | 5,164 |
|  | December 31, 2011 |
|  | Gross Assets |  |  | Accumulated Amortization |  |  | Net |
Trademarks |  | $ | 3,563 |  |  | $ | - |  |  | $ | 3,563 |
Patents and technology |  |  | 4,492 |  |  |  | 3,440 |  |  |  | 1,052 |
Customer relationships |  |  | 3,993 |  |  |  | 3,143 |  |  |  | 850 |
Distributor relationships |  |  | 378 |  |  |  | 310 |  |  |  | 68 |
Non-compete agreements |  |  | 396 |  |  |  | 396 |  |  |  | - |
Total intangible assets |  | $ | 12,822 |  |  | $ | 7,289 |  |  | $ | 5,533 |

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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 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: 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=7658586&loc=d3e16265-109275 + 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 Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 47 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: 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 Reference 4: 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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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