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Marketable Securities and Fair Value Measurements - Assumptions Used to Estimate Fair Value of Common Stock Warrants (Details) | Jun. 30, 2018 $ / shares
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Risk-free interest rate |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Warranty liability | 0.0232
Expected volatility |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Warranty liability | 0.43
Expected Term |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Warrants, expected life in years | 2 months 12 days
Dividend yield |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Warranty liability | 0

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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 Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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