Fair Value Measurements Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 9 Months Ended | |||||
|---|---|---|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
Aug. 31, 2018 |
Jan. 12, 2018 |
Oct. 21, 2016 |
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| Fair Value Disclosures [Abstract] | |||||||
| Warrant shares (in shares) | 1,239,286 | 1,239,286 | 100,000 | 925,000 | 314,286 | ||
| Warrant, exercise price (in dollars per share) | $ 2.43 | $ 1.96 | $ 2.80 | ||||
| Change in fair value of warrant liability | $ (401) | $ 15 | $ (292) | $ (52) | |||
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- Definition Exercise price per share or per unit of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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- Definition Amount of unrealized gain (loss) recognized in the income statement for a financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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