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Organization and Summary of Significant Accounting Policies - Accrued Expenses (Details) - USD ($)
Jun. 30, 2020
Dec. 31, 2019
Accounting Policies [Abstract]    
Employee wages and benefits $ 285,133 $ 474,388
Research and development expenses 38,711 69,795
Other 54,280 21,820
Accrued expenses $ 378,124 $ 566,003