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Organization and Summary of Significant Accounting Policies - Accounts Payable (Details) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]    
Research and development expenses $ 590,452 $ 766,001
Legal expenses 9,782 26,994
Other 53,139 150,383
Accounts payable $ 653,373 $ 943,378