Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Summary of Anti-dilutive Stock Based Compensation Awards and Convertible Notes (Detail)

v3.20.2
Summary of Significant Accounting Policies - Summary of Anti-dilutive Stock Based Compensation Awards and Convertible Notes (Detail) - shares
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Stock Options [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Anti-dilutive stock based compensation awards 19,300 19,300
Stock Warrants [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Anti-dilutive stock based compensation awards 14,790,059 2,879,287
Convertible Notes [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Anti-dilutive stock based compensation awards   1,436,424