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Summary of Significant Accounting Policies - Fair Value of Warrant Liability (Details) $ in Thousands | Dec. 31, 2017 USD ($)
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Fair value of warrant liability | $ 503
Quoted Prices in Active Markets for Identical Assets (Level 1) |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Fair value of warrant liability | 0
Significant Other Observable Inputs (Level 2) |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Fair value of warrant liability | 0
Significant Other Unobservable Inputs (Level 3) |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Fair value of warrant liability | $ 503

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- Definition Aggregation of the liabilities reported on the balance sheet measured at fair value on a recurring basis by the entity. + References No definition available. + Details
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