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Derivative Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]  
Schedule of fair value of the warrants The fair value of the Warrants at December 31, 2018 was determined by using option pricing models assuming the following:

 

 

 

December 31,

 

December 31,

 

 

2018

 

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%

Assets and liabilities measured at fair value on a recurring basis

 

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

 

Fair value measurements using significant unobservable 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