Annual report pursuant to Section 13 and 15(d) 12-31-2018

Fair Value Measurements - Schedule of Assumptions Used in Estimating Fair Value (Details)

v3.19.1
Fair Value Measurements - Schedule of Assumptions Used in Estimating Fair Value (Details) - Common Stock Warrants [Member]
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Black-Scholes-Merton Valuation Model [Member] | Weighted-Average Risk-Free Interest Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value assumptions, measurement input, percentages 2.51% 1.89%
Black-Scholes-Merton Valuation Model [Member] | Weighted-Average Expected Life [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value assumptions, measurement input, term 10 months 25 days 1 year 10 months 25 days
Black-Scholes-Merton Valuation Model [Member] | Expected Dividend Yield [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value assumptions, measurement input, percentages 0.00% 0.00%
Black-Scholes-Merton Valuation Model [Member] | Weighted-Average Expected Volatility [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value assumptions, measurement input, percentages 157.00% 107.00%
Monte Carlo Simulation Valuation Model [Member] | Weighted-Average Risk-Free Interest Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value assumptions, measurement input, percentages 2.46% 2.20%
Monte Carlo Simulation Valuation Model [Member] | Weighted-Average Expected Life [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value assumptions, measurement input, term 3 years 1 month 6 days 3 years 7 months 6 days
Monte Carlo Simulation Valuation Model [Member] | Expected Dividend Yield [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value assumptions, measurement input, percentages 0.00% 0.00%
Monte Carlo Simulation Valuation Model [Member] | Weighted-Average Expected Volatility [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value assumptions, measurement input, percentages 68.00% 64.00%