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The Company (Tables)
 3 Months Ended
Mar. 31, 2021
The Company [Abstract]  
Calculation of Basic and Diluted Loss Per Share by Class of Security
The following table presents the calculation of basic and diluted loss per share by each class of security for the three months ended March 31, 2021, and 2020:
 
  
Three Months Ended
March 31, 2021
  
Three Months Ended
March 31, 2020
 
  
Common Stock
  
Series C
Convertible
Preferred Stock
  
Common Stock
  
Series C
Convertible
Preferred Stock
 
             
Loss attributable to each class
 
$
(2,418
)
 
$
-
  
$
(1,018
)
 
$
(17
)
                 
Weighted average number of shares outstanding during the period
  
33,802,129
   
-
   
33,164,321
   
1,480
 
                 
Basic and Diluted loss per share
 
$
(0.07
)
 
$
-
  
$
(0.03
)
 
$
(11.42
)
Antidilutive Securities Excluded from Computation of Earnings Per Share
The following table sets forth the weighted average of potential common stock equivalents outstanding during the three months ended March 31, 2021, and 2020 that have been excluded from the loss per share calculation as their inclusion would have been anti-dilutive:
 
  
Three Months Ended
March 31,
 
  
2021
  
2020
 
Common stock purchase warrants
  
6,384
   
749,901
 
Restricted stock units
  
87,109
   
169,023
 
Common stock options
  
5,837,085
   
4,908,038
 
Total
  
5,930,578
   
5,826,962