Summary of Significant Accounting Policies - Summary of Anti-dilutive Stock Based Compensation Awards and Convertible Notes (Detail) - shares		9 Months Ended
	Jan. 16, 2019	Sep. 30, 2019	Sep. 30, 2018
Stock Options [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive stock based compensation awards		19,300	19,800
Stock Warrants [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive stock based compensation awards		2,879,287	160,000
Convertible Notes [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive stock based compensation awards	1,436,424	1,436,424