Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Outstanding Warrants Valuation Assumption (Detail)

v3.10.0.1
Stockholders' Equity - Outstanding Warrants Valuation Assumption (Detail)
Sep. 30, 2018
$ / shares
Dec. 31, 2017
$ / shares
Measurement Input, Risk Free Interest Rate    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Warrants and Rights Outstanding, Measurement Input 0.0281 0.0189
Measurement Input, Expected Term    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Expected life (in years) 1 year 4 months 20 days 2 years 1 month 17 days
Measurement Input, Expected Dividend Rate    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Warrants and Rights Outstanding, Measurement Input 0.00 0.00
Measurement Input, Price Volatility    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Warrants and Rights Outstanding, Measurement Input 0.82 1.03
Measurement Input, Share Price    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Warrants and Rights Outstanding, Measurement Input 5.39 10.02