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Research and Development and Government and Industry Funded Contracts (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Government and Industry Funded Contracts [Abstract] |  |  |
Research and development expense | $ 173 | $ 6,737 | $ 3,554
DOE funding | 821 | 1,375 | 1,756
Industry cost-share funding | 0 | 0 | 277
Research and development expense, net | (648) | 5,362 | 1,521
Business Acquisition [Line Items] |  |  |
Asset impairment charges | $ 520 | 2,087 | $ 355
ADA Analytics Israel, LLC |  |  |
Business Acquisition [Line Items] |  |  |
Asset impairment charges |  | $ 1,900 |

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- Definition Government and Industry Funded Contracts [Abstract] + References No definition available. + Details
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- Definition Research and Development Arrangement with Federal Government, Costs Incurred, Gross + References No definition available. + Details
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- Definition Research and Development Arrangement with Federal Government, Industry Cost-Share Funding + References No definition available. + Details
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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The net amount of research and development costs incurred for a fixed-price, best-efforts research and development cost-sharing arrangement with the Federal Government. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 912 -SubTopic 730 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6472174&loc=d3e58812-109433 + Details
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- Definition The amount of customer funding recorded as an offset to costs incurred for a fixed-price, best-efforts research and development cost-sharing arrangement with the Federal Government. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 912 -SubTopic 730 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6472174&loc=d3e58812-109433 + Details
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