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)

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Summary of Significant Accounting Policies - Summary of Anti-dilutive Stock Based Compensation Awards and Convertible Notes (Detail) - shares
6 Months Ended
Jun. 30, 2020
Jun. 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 2,731,587 3,959,287