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Warrants (Tables)
 6 Months Ended
Jun. 30, 2018
Text Block [Abstract]  
Summary of Change in Warrant

The following table summarizes the change in warrants for the six months ended June 30, 2018:

 

 

 

 

 

 

 

 

 

 

 

Weighted

 

 

 

 

 

 

 

 

 

 

 

Weighted

 

 

Average

 

 

Weighted

 

 

 

 

 

 

 

Average

 

 

Remaining

 

 

Average

 

 

 

Number of

 

 

Exercise

 

 

Contractual

 

 

Grant Date

 

 

 

Warrants

 

 

Price

 

 

Life (in years)

 

 

Fair Value

 

Outstanding at December 31, 2017

 

 

13,162,668

 

 

$

1.08

 

 

 

4.5

 

 

$

0.39

 

Exercised

 

 

(4,537,722

)

 

 

1.11

 

 

 

—

 

 

 

—

 

Cancelled

 

 

(95,600

)

 

 

1.65

 

 

 

—

 

 

 

—

 

Outstanding at June 30, 2018

 

 

8,529,346

 

 

 

1.05

 

 

 

4.5

 

 

$

0.40