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Basis of Presentation and Summary of Significant Accounting Policies - Warrants (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Derivative financial instruments      
Derivative financial instruments—warrants $ 284,971 $ 4,127  
Warrants to purchase Common Stock | Black Scholes Option Pricing Method      
Derivative financial instruments      
Derivative financial instruments—warrants $ 284,971 $ 4,127 $ 32,315