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Segment Information - Financial information concerning the company's reportable segments (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012
Corporate and other (expenses) income: |  |  |  |  |
Product revenue | $ 2,311 | $ 1,083 | $ 6,778 | $ 3,653 |
Unfunded research and product development expenses (income) | 301 | 327 | 948 | 1,037 |
Selling, general and administrative expenses | 880 | 1,308 | 2,626 | 3,378 |
Segment profit (loss) from operations before income taxes and non-controlling interest | 259 | (1,179) | 566 | (2,524) |
Segment profit (loss) | 164 | (1,149) | 350 | (2,540) | (2,086)
Total assets | 4,634 | 4,214 | 4,634 | 4,214 | 4,845
Capital expenditures | 26 | 2 | 68 | 12 |
Depreciation | 22 | 29 | 68 | 102 |
Test and Measurement Instrumentation |  |  |  |  |
Corporate and other (expenses) income: |  |  |  |  |
Product revenue | 2,311 | 1,083 | 6,778 | 3,653 |
Unfunded research and product development expenses (income) | 301 | 327 | 948 | 1,038 |
Selling, general and administrative expenses | 572 | 472 | 1,582 | 1,423 |
Segment profit (loss) from operations before income taxes and non-controlling interest | 438 | (668) | 1,191 | (1,491) |
Segment profit (loss) | 438 | (668) | 1,191 | (1,491) |
Total assets | 2,191 | 2,039 | 2,191 | 2,039 |
Capital expenditures | 2 | 2 | 44 | 12 |
Depreciation | 21 | 23 | 62 | 73 |
New Energy |  |  |  |  |
Corporate and other (expenses) income: |  |  |  |  |
Unfunded research and product development expenses (income) |  |  |  | (1) |
Selling, general and administrative expenses | 25 | 41 | 67 | 137 |
Segment profit (loss) from operations before income taxes and non-controlling interest | (33) | (68) | (99) | 20 |
Segment profit (loss) | (34) | (69) | (99) | 19 |
Total assets | 38 | 159 | 38 | 159 |
Depreciation |  | 6 | 4 | 29 |
Other |  |  |  |  |
Corporate and other (expenses) income: |  |  |  |  |
Selling, general and administrative expenses | 283 | 795 | 977 | 1,818 |
Segment profit (loss) from operations before income taxes and non-controlling interest | (146) | (443) | (526) | (1,053) |
Segment profit (loss) | (258) | (448) | (794) | (1,058) |
Total assets | 2,405 | 2,016 | 2,405 | 2,016 |
Capital expenditures | 24 |  | 24 |  |
Depreciation | 1 |  | 2 |  |
Reconciling Items |  |  |  |  |
Corporate and other (expenses) income: |  |  |  |  |
Segment profit (loss) | $ 18 | $ 36 | $ 52 | $ (10) |

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 + Details
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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 4 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6386349&loc=d3e3636-108311 + Details
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