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Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2019
Equity [Abstract]  
Schedule of Outstanding Warrants
As of December 31, 2019, we had outstanding Warrants to purchase 103,125 shares of our common stock as follows:
Date of Issuance
 
No. of Warrants
 
Exercise Price
 
Expiration Date
May 2, 2012
 
15,625
 
$21.76
 
May 22, 2020
May 2, 2012
 
25,000
 
$25.36
 
May 22, 2020
Nov. 13, 2017
 
62,500
 
$18.08
 
Nov. 13, 2022