Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Common Share - Additional Information (Detail)

v3.19.3
Net Loss Per Common Share - Additional Information (Detail) - shares
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Stock Options and Warrants    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Shares issuable 8,121,000 7,723,000