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Common Stock and Common Stock Purchase Warrants (Tables)
3 Months Ended
Mar. 31, 2022
Equity [Abstract]  
Schedule of Outstanding Warrants to Purchase Common Stock

The common stock purchase warrants (classified in permanent equity) outstanding as of the dates indicated are as follows:

 

   Common Stock Purchase Warrants Issued and Outstanding    
   March 31, 2022   Weighted Average Exercise Price / Share   December 31, 2021   Weighted Average Exercise Price / Share   Expiration Date
Series Z Warrants   11,937,450   $1.60    11,937,455   $1.60   April 2024
Series W Warrants      $    377,873   $5.00   January 2022
Total   11,937,450   $1.60    12,315,328   $1.68