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Common Stock Warrants (Tables)
3 Months Ended
Mar. 31, 2020
Stockholders' Equity Note [Abstract]  
Schedule of Fair Value of Common Stock Warrant Liability

The change in fair value of the common stock warrant liability is presented in the following table and is reported as a change in fair value of common stock warrant liability in the statements of operations (in thousands):

 

    March 31, 2020  
Beginning balance   $  
Initial value of common stock warrant liability     11,677  
Change in fair value of common stock warrant liability     (4,532 )
Ending balance   $ 7,145