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Common Stock, Preferred Stock and Warrants (Tables)
9 Months Ended
Sep. 30, 2020
Preferred Stock Common Stock And Warrants [Abstract]  
Summary of Common Stock Warrants Outstanding

As of September 30, 2020, the following common stock warrants were outstanding:

 

Warrants Issuance Date

 

Shares Issuable

(in thousands)

 

 

Expiration Date

 

Exercise Price

per Share

 

 

Outstanding as of

September 30, 2020

(in thousands)

 

August 12, 2019

 

 

5,841

 

 

February 12, 2022

 

$

4.50

 

 

 

5,841