Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Common Share - Warrants and Options Excluded from Computation of Diluted Net Loss Per Share (Detail)

v3.10.0.1
Net Loss Per Common Share - Warrants and Options Excluded from Computation of Diluted Net Loss Per Share (Detail) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Warrants        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Shares issuable 3,522 3,274 3,522 3,274
Stock Options        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Shares issuable 4,201 1,870 4,201 1,870