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Derivative Financial Instruments | 12 Months Ended
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Dec. 31, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract] |
Derivative Financial Instruments |
(12) | DERIVATIVE FINANCIAL INSTRUMENTS
Management expects that the Warrants will either be exercised or expire worthless. The fair value of the Warrants at December 31, 2018 was determined by using option pricing models assuming the following:
|  | December 31, 2018 |  | December 31, 2017
Expected life (in years) |  | 1.13 - 5.11 |  | 0.82 - 4.88
Expected volatility |  | 145.7% - 265.3% |  | 130.9% - 266.9%
Risk-free interest rates |  | 2.5% - 2.6% |  | 1.7% - 2.1%
The table below presents the Company’s assets and liabilities measured at fair value on a recurring basis as of December 31, 2018 and 2017, aggregated by the level in the fair value hierarchy within which those measurements fall. Assets and Liabilities Measured at Fair Value on a Recurring Basis
|  | Assets and Liabilities Measured at Fair Value on a Recurring Basis |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Balance at December 31, |
(in thousands) |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative instrument liabilities |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 33 |  |  | $ | 560 |  |  | $ | 33 |  |  | $ | 560 |
For the twelve months ended December 31, 2018 and December 31, 2017 there were no transfers in or out of Level 1, 2 or 3 inputs. The table below presents the activity within Level 3 of the fair value hierarchy for the twelve months ended December 31, 2018: Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
(in thousands) |  | Warrant Liability |
Balance at January 1, 2017 |  | $ | 18,751 |
Total change in the liability included in earnings |  |  | (15,103 | )
Extinguishment of convertible note warrant |  |  | (17,489 | )
Fair value of warrants issued |  |  | 16,953 |
Fair value of warrants exercised |  |  | (2,552 | )
Balance at December 31, 2017 |  |  | 560 |
Fair value of warrants issued |  |  | 23,533 |
Total change in the liability included in earnings |  |  | (19,706 | )
Reclass from liability to equity |  |  | (4,210 | )
Fair value of warrants exchanged |  |  | (144 | )
Balance at December 31, 2018 |  | $ | 33 |

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- References No definition available. + Details
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- Definition The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -URI http://asc.fasb.org/topic&trid=2229140 + Details
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