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Stockholders' Equity/ (Deficit) (Tables)
 12 Months Ended
Dec. 31, 2020
Schedule of Recognized Stock-Based Compensation Expense

During the year ended December 31, 2020, the Company recognized stock-based compensation expense as follows (in thousands):

 

   

Year Ended

December 31, 2020

  
Shares issued for services   $ 13,410  
Employee stock options     17,325  
Market and performance based stock options     20,858  
Restricted stock units     146  
    $ 51,739  
Schedule of Stock Options Assumptions

The following was used in determining the fair value of stock options granted during the year ended December 31, 2020:

 

    For the Year Ended  
    December 31, 2020  
Dividend yield     -  
Expected price volatility     44.4% - 57.3 %
Risk free interest rate     0.23% - 0.58 %
Expected term     5.3 - 7.5 years  
Schedule of Stock Option Activity

A summary of activity under the Plan for the year ended December 31, 2020 is as follows (in thousands, except share and per share amounts):

 

    Number of Shares     Weighted Average
Exercise Price		     Total Intrinsic Value     Weighted Average Remaining Contractual Life
(in years)		  
Outstanding as of December 31, 2019     16,667     $ 28.20     $ -       7.3  
Options assumed from Merger     8,051,098     $ 1.31                  
Granted     11,350,269     $ 9.35                  
Exercised     (1,418,532 )   $ 1.52                  
Forfeited or expired     (448,937 )   $ 1.00                  
Outstanding as of December 31, 2020     17,550,565     $ 6.51     $ 376,836       8.5  
                                 
Options vested and exercisable as of December 31, 2020     9,624,127     $ 5.68     $ 214,797       8.1  
Summary of Outstanding Warrants Activity

A summary of the Company’s outstanding warrants as of December 31, 2020 are presented below (in thousands, except share and per share amounts):

 

    Number of Warrants     Weighted Average
Exercise Price		     Total Intrinsic Value     Weighted Average Remaining Contractual Life
 (in years)		  
Outstanding as of December 31, 2019     200,007     $ 13.31     $ -       0.2  
Issued     9,538,526     $ 6.62               1.7  
Exercised     (7,003,005 )   $ 4.96               -  
Expired     (200,000 )   $ -     $ -       -  
Outstanding as of December 31, 2020     2,535,528     $ 8.22     $ 50,560       1.0  
                                 
Warrants exercisable as of December 31, 2020     2,535,528     $ 8.22     $ 50,560       1.0  
Market and Service Condition Based Options [Member]  
Schedule of Stock Options Assumptions

Stock based compensation expense is based on the estimated value of the awards on the grant date, and is recognized over the period from the grant date through the expected vest dates of each vesting condition, both of which were estimated based on a Monte Carlo simulation model applying the following key assumptions as of the grant date:

 

Dividend yield     — %
Expected volatility     76.0 – 88.1 %
Risk free rate     0.24 – 0.30 %
Derived service period     1.59 – 1.91  
Schedule of Stock Option Activity

A summary of activity under the Plan for market and service based stock options for the nine months ended September 30, 2020 is as follows (in thousands, except share and per share amounts):

 

    Number of Shares     Weighted Average
Exercise Price		     Total Intrinsic Value     Weighted Average
Remaining
Contractual Life
(in years)		  
Outstanding as of December 31, 2019     -     $              -     $               -                 -  
Granted     3,078,297     $ 9.69               6.8  
Outstanding as of September 30, 2020     3,078,297     $ 9.69     $ 450       6.6  
                                 
Options vested and exercisable as of September 30, 2020     -     $ 9.69     $ -       6.6