Annual report pursuant to Section 13 and 15(d)

Net Loss per Common Share - Additional Information (Detail)

v3.20.1
Net Loss per Common Share - Additional Information (Detail) - shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 18,293,739 17,682,146
Restricted Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 12,625,144 11,174,113