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Loss Per Share Applicable to Common Stockholder (Tables)
3 Months Ended
Mar. 31, 2021
Earnings Per Share [Abstract]  
Summary of Common Share Equivalents Been Excluded from Dilutive Loss Per Share as Anti-dilutive

The following table summarizes the Company’s securities, in common stock equivalents, which have been excluded from the calculation of dilutive loss per share as their effect would be anti-dilutive:

 

    March 31, 2021     March 31, 2020  
Series D Preferred Stock     153,000       303,782  
Series E Preferred Stock     875,000       1,715,000  
Stock Options - employee and non-employee     1,928,544       1,556,332  
Warrants     5,447,594       266,667  
Total     8,404,138       3,841,781