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Stockholders' Equity (Deficit) (Tables)
12 Months Ended
Dec. 31, 2020
Equity [Abstract]  
Summary of Warrant Activity

The following is a summary of warrant activity for the year ended December 31, 2020 and 2019:

 

    Number of Warrants  
Outstanding as of December 31, 2018     1,955,274  
Warrants exercise for cash     (725,564 )
Expiration of warrant     (291,806 )
Outstanding as of December 31, 2019     937,904  
Issuance of Series C Warrants     2,000,000  
Expiration of warrant     (434,989 )
Outstanding as of December 31, 2020     2,502,915