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Organization and Summary of Significant Accounting Policies - Stock-Based Compensation (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock based compensation $ 101,415 $ 14,662 $ 236,221 $ 72,071 $ 86,733 $ 567,112
Directors            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Warrants issued for services         0 508,739
Officers and Employees            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock based compensation         $ 86,733 $ 58,373