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

A summary of the restricted stock award activity during the years ended December 31, 2020 and 2019 is as follows:

 

    Number of Shares     Weighted Average Grant-Fair  
    Unvested     Vested     Value Date  
Restricted stock awards outstanding at January 1, 2019     6,309,874       10,484,046     $ 0.50  
Issued     833,333       -       0.48  
Vested     (3,926,542 )     3,926,542          
Forfeited     (825,000 )     (402,512 )        
Restricted stock awards outstanding at December 31, 2019     2,391,665       14,008,076       0.56  
Issued     562,500       -       0.18  
Vested     (2,237,500 )     2,237,500          
Restricted stock awards subject to repurchase     -       (1,064,549 )        
Forfeited     (399,998 )     (746,813 )        
Restricted stock awards outstanding at December 31, 2020     316,667       14,434,214       0.42  

Summary of Warrant Activity

A summary of the Financing Warrants activity during the years ended December 31, 2020 and 2019 is as follows:

 

                Weighted  
                Average  
          Weighted     Remaining  
    Number     Average     Contractual  
    of     Exercise     Life  
    Shares     Price     (in Years)  
Financing Warrants outstanding at January 1, 2019     3,949,018     $ 0.64       4.81  
Exercised     (1,066,963 )                
Financing Warrants outstanding at December 31, 2019     2,882,055       0.80       3.95  
Financing Warrants outstanding at December 31, 2020     2,882,055       0.60       2.94  
Financing Warrants exercisable at December 31, 2020     2,882,055       0.60       2.94  

Schedule of Common Stock Financing Warrants Outstanding and Exercisable

The Financing Warrants outstanding and exercisable as of December 31, 2020 are summarized as follows:

 

              Outstanding        
    Exercise Price     Expiration Date   Classified as Derivative Liabilities (Shares)     Classified within Stockholders’ Equity (Shares)     Total Exercisable (Shares)  
MDB Warrants   $ 0.20     November 4, 2021     -       327,490       327,490  
Strome Warrants     0.50     June 15, 2023     1,500,000       -       1,500,000  
B. Riley Warrants     1.00     October 18, 2025     875,000       -       875,000  
MDB Warrants     1.15     October 19, 2022     -       119,565       119,565  
MDB Warrants     2.50     October 19, 2022     -       60,000       60,000  
Total outstanding and exercisable                 2,375,000       507,055       2,882,055