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Warrants (Tables)
 3 Months Ended
Mar. 31, 2018
Text Block [Abstract]  
Summary of Change in Warrant

The following table summarizes the change in warrants for the three months ended March 31, 2018:

 

 

 

 

 

 

 

 

 

 

 

Weighted

 

 

 

 

 

 

 

 

 

 

 

Weighted

 

 

Average

 

 

 

 

 

 

 

 

 

 

 

Average

 

 

Remaining

 

 

Weighted

 

 

 

Number of

 

 

Exercise

 

 

Contractual

 

 

Average

 

 

 

Warrants

 

 

Price

 

 

Life (in years)

 

 

Fair Value

 

Outstanding at December 31, 2017

 

 

13,162,668

 

 

$

1.08

 

 

 

4.5

 

 

$

0.39

 

Exercised

 

 

(1,182,857

)

 

 

1.44

 

 

 

—

 

 

 

—

 

Cancelled

 

 

(95,600

)

 

 

1.65

 

 

 

—

 

 

 

—

 

Outstanding at March 31, 2018

 

 

11,884,211

 

 

 

1.03

 

 

 

4.5

 

 

$

0.34