Fair Value Measurement (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2017 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
The following table sets forth the changes in the estimated fair value for the Company’s Level 3 classified derivative warrant liability (in thousands):
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| NSC Notes [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block] |
The fair value of the NSC Contingently Issuable Warrants was determined at December 31, 2016 for approximately $0.3 million by applying management’s estimate of the probability of issuance of the Contingently Issuable Warrants together with the Black-Scholes option pricing model with the following key assumptions:
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| Westpark Contingently Issuable Warrants [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
The following table sets forth the changes in the estimated fair value for our Level 3 classified convertible notes payable (in thousands):
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| Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block] |
The fair value of Westpark warrant liability at December 31, 2016 was measured at fair value for approximately $12,000 using a Monte Carlo simulation valuation methodology. A summary of the weighted average (in aggregate) significant unobservable inputs (Level 3 inputs) used in measuring the Company’s warrant liabilities that are categorized within Level 3 of the fair value hierarchy for the year ended December 31, 2016 is as follows:
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