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Basis of Presentation and Summary of Significant Accounting Policies (Tables)
3 Months Ended
Mar. 31, 2021
Accounting Policies [Abstract]  
Common Stock Equivalents Excluded from Computation of Diluted Net Loss Per Share of Common Stock

The following common stock equivalents were excluded from the computation of diluted net loss per common share of common stock for the periods presented because including them would have been antidilutive (in thousands):

 

   

Three Months Ended

March 31, (Unaudited)

 
    2021     2020  
Stock options     2,156       6,350  
Warrants     3,136       3,384