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
3 Months Ended
Jan. 16, 2019
Mar. 31, 2020
Mar. 31, 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   3,959,287 3,834,287
Convertible Notes [Member]      
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Anti-dilutive stock based compensation awards 1,436,424