Annual report pursuant to Section 13 and 15(d)

Fair Value Measurement - Additional Information (Details)

v3.10.0.1
Fair Value Measurement - Additional Information (Details) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Probability of low case scenario 20.00%  
Probability of base case scenario 75.00%  
Probability of high case scenario 5.00%  
Fair Value, Measurements, Nonrecurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets recorded at fair value on a non-recurring basis $ 0 $ 0
Hybrid Instrument | Measurement Input, Discount Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liability, measurement input 0.18