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Organization and Summary of Significant Accounting Policies - Accounts Receivable (Details) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Accounts receivable $ 318,744 $ 271,029
Billed receivable    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Accounts receivable 193,065 208,475
Unbilled receivable    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Accounts receivable $ 125,679 $ 62,554