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Stockholder's Equity - Schedule of Weighted-average Assumptions used in Black-Scholes Valuation Method (Details)
12 Months Ended
Dec. 31, 2017
$ / shares
Risk-free interest rate 1.72%
Expected term (in years) 6 years 6 months
Expected dividend yield
Expected volatility 75.00%
Warrant [Member]  
Risk-free interest rate 1.47%
Expected term (in years) 2 years 9 months 29 days
Expected dividend yield
Expected volatility 75.00%
Fair value of common stock $ 4.72