Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments - Summary of Quantitative Information with Respect to Significant Unobservable Inputs (Detail)

v3.10.0.1
Financial Instruments - Summary of Quantitative Information with Respect to Significant Unobservable Inputs (Detail)
Apr. 06, 2018
May 17, 2017
April 2018 Warrant [Member] | Volatility [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Warrants, measurement input 70  
April 2018 Warrant [Member] | Risk-free Rate [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Warrants, measurement input 2.58  
April 2018 Warrant [Member] | Term [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Warrants term 5 years  
10% Warrant [Member] | Volatility [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Warrants, measurement input   70
10% Warrant [Member] | Risk-free Rate [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Warrants, measurement input   1.44
10% Warrant [Member] | Discount for Lack of Marketability [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Warrants, measurement input   0