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Organization, Basis of Presentation and Summary of Significant Accounting Policies (Fair Value Assumptions) (Details)
3 Months Ended
Mar. 31, 2017
Risk-free interest rate, minimum 1.19%
Risk-free interest rate, maximum 1.88%
Dividend yield
Volatility of common stock, minimum 97.10%
Volatility of common stock, maximum 99.06%
Estimated annual forfeitures
Minimum [Member]  
Expected term (in years) 2 years
Maximum [Member]  
Expected term (in years) 5 years