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Warrants (Tables)
9 Months Ended
Sep. 30, 2018
Warrants And Rights Note Disclosure [Abstract]  
Schedule of Warrants to Purchase Common Stock Outstanding

The Company has warrants to purchase its common stock outstanding as of September 30, 2018, as follows:

 

Issued

 

     Classification

 

            Warrants Outstanding

 

 

     Exercise Price

 

 

                          Expiration

September 2016

 

Liability

 

 

13,466,667

 

 

$

2.25

 

 

November 2021

March 2015

 

Equity

 

 

3,699

 

 

 

9.75

 

 

March 2025

July 2014

 

Equity

 

 

6,566

 

 

 

7.99

 

 

July 2024

July 2012

 

Equity

 

 

52,046

 

 

 

0.01

 

 

July 2022