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Organization and Summary of Significant Accounting Policies - Prepaid Expenses and Other Current Assets (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Accounting Policies [Abstract]    
Prepaid insurance $ 173,890 $ 91,725
Prepaid expenses - various 101,221 77,249
Prepaid taxes 2,888 3,027
Prepaid expenses and other current assets $ 277,999 $ 172,001