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Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2019
Stockholders' Equity  
Schedule of Warrants Outstanding to Purchase Common Stock

 

 

 

 

 

 

 

 

 

 

    

Number of 

    

 

 

    

 

 

 

 

Warrantss

 

 

 

 

 

 

 

 

(in thousands)

 

Range 

 

Weighted Average  

Outstanding and exercisable at December 31, 2017

 

1,612

 

$

 1.50 – 3.00

 

$

1.56

Exercised

 

(1,612)

 

$

 1.50 – 3.00

 

$

1.56

Outstanding and exercisable at December 31, 2018

 

 —

 

 

 —

 

 

 —

Granted

 

39

 

$

6.80

 

$

6.80

Outstanding and exercisable at December 31, 2019

 

39

 

$

6.80

 

$

6.80