Fair Value of Financial Instruments - Schedule of Inputs of the Black-Scholes Option Pricing Model (Details) - Black-Scholes option pricing model - Warrant liability - Level 3	Mar. 31, 2019 $ / shares	Dec. 31, 2018 $ / shares
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contractual term	3 months	6 months
Market value of the Common Stock
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Option pricing model input	7.49	9.25
Risk-free interest rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Option pricing model input	0.024	0.026
Estimated price volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Option pricing model input	0.775	0.550