Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

v3.8.0.1
Income Taxes - Additional Information (Detail) - USD ($)
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Federal and State    
Income Taxes [Line Items]    
Net operating loss carryforwards $ 61,000,000  
US Federal    
Income Taxes [Line Items]    
Current income tax expense benefit 0 $ 0
Deferred income tax expense benefit $ 0 $ 0