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Warrants (Tables)
6 Months Ended
Jun. 30, 2021
Equity [Abstract]  
Schedule of Warrants Issued and Outstanding
As of June 30, 2021, the following warrants for common stock were issued and outstanding:
Issue dateExpiration dateExercise priceNumber of warrants outstanding
January 11, 2017None$0.001 3,578,036 
November 20, 2017None$0.001 3,669,360 
June 11, 2018None$0.001 358,415 
7,605,811