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Summary of Operations and Significant Accounting Policies - Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items] |  |
Weighted-Average Amortization Period (in years) | 16 years |
Initial Cost | $ 2,438 | $ 2,267
Net of Accumulated Amortization | $ 696 | 1,941
Patents |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted-Average Amortization Period (in years) | 16 years |
Initial Cost | $ 913 | 742
Net of Accumulated Amortization | 696 | 581
Licensed technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Initial Cost | 1,525 | 1,525
Net of Accumulated Amortization | $ 0 | $ 1,360

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + 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)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + 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)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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