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Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2014
Equity [Abstract]  
Schedule of Outstanding Common Stock Warrants
Outstanding common stock warrants on December 31, 2014 consist of the following:
 
 
 
 
 
Total
 
 
 
 
Issue Date
 
Expiration Date
 
Warrants
 
Ex. Price
 
4/26/2013
 
4/26/2018
 
 
69,321
 
$
11.18
 
10/31/2013
 
4/30/2019
 
 
685,715
 
$
8.50
 
2/5/2014
 
2/5/2019
 
 
1,329,731
 
$
7.40
 
7/24/2014
 
7/24/2019
 
 
6,198,832
 
$
2.45
 
7/24/2014
 
1/24/2016
 
 
4,795,321
 
$
2.45
 
 
 
 
 
 
13,078,920