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Warrants
3 Months Ended
Mar. 31, 2018
Stockholders' Equity Note [Abstract]  
Warrants
Warrants
All of the Company’s outstanding warrants were classified as liabilities as of March 31, 2018 and December 31, 2017 because they contained non-standard antidilution provisions.
The following is a summary of the Company’s outstanding warrants as of March 31, 2018 and December 31, 2017:
 
 
Warrant
shares
 
Exercise
price
 
Expiration
Common stock
 
7,030

 
$
128.00

 
2019
Common stock
 
130

 
$
2,520.00

 
2019