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Warrants (Tables)
6 Months Ended
Jun. 30, 2017
Stockholders' Equity Note [Abstract]  
Summary of the Company's outstanding warrants
The following is a summary of the Company’s outstanding warrants as of June 30, 2017 and December 31, 2016:
 
 
 
June 30, 2017
 
 
Warrant
shares
 
Exercise
price
 
Expiration
Common stock
 
7,030

 
$
128.00

 
2019
Common stock
 
130

 
$
2,520.00

 
2019


 
 
December 31, 2016
 
 
Warrant
shares
 
Exercise
price
 
Expiration
Common stock
 
6,250

 
$
128.00

 
2017
Common stock
 
7,030

 
$
128.00

 
2019
Common stock
 
130

 
$
2,520.00

 
2019