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Fair Value Measurements - Narrative (Details) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Impact of 10% change in expected volatility rate | $ 50
Impact of 10% change in the estimate of fair value of the common stock | $ 94
Warrant Liability | Common Stock |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Expected term (in years) | 3 years
Risk-free interest rate (as a percent) | 2.38%
Expected volatility (as a percent) | 78.10%
Expected dividend yield (as a percent) | 0.00%

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- Definition Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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