Fair Value Measurements (Tables)
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12 Months Ended |
Dec. 31, 2018 |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
The Company’s financial assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2018 and 2017 by level within the fair value hierarchy, are as follows:
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Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] |
A summary of the weighted average significant unobservable inputs (Level 3 inputs) used in measuring the Company’s warrant liability that is categorized within Level 3 of the fair value hierarchy as of December 31, 2018 and 2017 is as follows:
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Risk-free rate of interest |
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Derivative Financial Instruments, Liabilities [Member] |
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Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
The following table includes a summary of changes in fair value of the Company’s warrant liability measured at fair value using significant unobservable inputs (Level 3) for the years ended December 31, 2018 and 2017:
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Reclassification to equity at initial public offering |
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Warrant [Member] |
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Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
The following table includes a summary of changes in fair value of the Company’s derivative liability measured at fair value using significant unobservable inputs (Level 3) for the years ended December 31, 2018 and 2017:
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For the year ended December 31, |
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Write-off on extinguishment of convertible notes payable |
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Reclassification to equity at initial public offering |
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Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] |
A summary of the weighted average significant unobservable inputs (Level 3 inputs) used in measuring the Company’s embedded conversion options that is categorized within Level 3 of the fair value hierarchy as of July 25, 2018 and December 31, 2017 are as follows:
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Risk-free rate of interest |
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