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Warrants (Tables)
 3 Months Ended
Mar. 31, 2019
Text Block [Abstract]  
Summary of Change in Warrant

The following table summarizes the change in warrants for the three months ended March 31, 2019:

 

 

 

 

 

 

 

 

 

 

 

Weighted

 

 

 

 

 

 

 

 

 

 

 

Weighted

 

 

Average

 

 

 

 

 

 

 

 

 

 

 

Average

 

 

Remaining

 

 

Weighted

 

 

 

Number of

 

 

Exercise

 

 

Contractual

 

 

Average

 

 

 

Warrants

 

 

Price

 

 

Life (in years)

 

 

Fair Value

 

Outstanding at December 31, 2018

 

 

4,329,437

 

 

$

1.03

 

 

 

3.7

 

 

$

0.26

 

Exercised

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Expired

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Outstanding at March 31, 2019

 

 

4,329,437

 

 

$

1.03

 

 

 

3.5

 

 

$

0.26