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Note 3 - Supplemental Balance Sheet Information (Tables) | 12 Months Ended
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Dec. 31, 2012
Schedule of Inventory, Current [Table Text Block] |
|  | December 31, |
|  | 2012 |  |  | 2011 |
Raw materials |  | $ | 15,023 |  |  | $ | 20,097 |
Work in process |  |  | 4,863 |  |  |  | 4,770 |
Finished products |  |  | 10,484 |  |  |  | 10,100 |
|  |  | 30,370 |  |  | $ | 34,967 |
Property, Plant and Equipment [Table Text Block] |
|  | December 31, |
|  | 2012 |  |  | 2011 |
Land |  | $ | 123 |  |  | $ | 123 |
Buildings and Leasehold Improvements |  |  | 7,381 |  |  |  | 7,000 |
Machinery and Equipment |  |  | 46,606 |  |  |  | 44,770 |
Furniture and Fixtures |  |  | 1,810 |  |  |  | 1,894 |
Computer Hardware and Software |  |  | 4,103 |  |  |  | 3,815 |
Construction in Progress |  |  | 1,275 |  |  |  | 641 |
|  |  | 61,298 |  |  |  | 58,243 |
Less: Accumulated Depreciation |  |  | 48,883 |  |  |  | 45,655 |
|  | $ | 12,415 |  |  | $ | 12,588 |
Schedule of Goodwill [Table Text Block] |
|  | Battery & |  |  | Communications |  |  | Discontinued |  |  |  |
|  | Energy Products |  |  | Systems |  |  | Operations |  |  | Total |
Balance at December 31, 2010 |  | $ | 4,758 |  |  | $ | 11,493 |  |  | $ | 2,025 |  |  | $ | 18,276 |
Effect of foreign currency translations |  |  | 80 |  |  |  | - |  |  |  | - |  |  |  | 80 |
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 |  |  | 13 |  |  |  | - |  |  |  | - |  |  |  | 13 |
Balance at December 31, 2012 |  | $ | 4,851 |  |  | $ | 11,493 |  |  | $ | - |  |  | $ | 16,344 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | December 31, 2012 |
|  |  |  |  | Accumulated |  |  |  |
|  | Gross Assets |  |  | 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 |
|  | December 31, 2011 |
|  |  |  |  | Accumulated |  |  |  |
|  | Gross Assets |  |  | 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 the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph b -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 5 -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 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + 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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