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Subsequent Events - Additional Information (Detail) - USD ($)	Feb. 13, 2020	Jan. 15, 2020	Feb. 19, 2020	Dec. 31, 2019	Dec. 31, 2018
Subsequent Event [Line Items]
Common stock, par value				$ 0.001	$ 0.001
Common stock, shares outstanding				12,967,338	9,422,143
Preferred stock, shares outstanding				0	0
Subsequent Event [Member]
Subsequent Event [Line Items]
Common stock, shares outstanding			16,069,562
Subsequent Event [Member] | Common Stock [Member]
Subsequent Event [Line Items]
Convertible preferred stock, shares issued upon conversion			3,796,000
Subsequent Event [Member] | Series X Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred stock, shares outstanding			3,796
Subsequent Event [Member] | Warrant Exercise Agreements [Member] | Warrants [Member]
Subsequent Event [Line Items]
Warrants to purchase common stock		6,898,224
Warrant reduced exercise price per share		$ 0.715
Warrant additional exercise price per share		$ 0.125
Common stock shares gross proceeds value		$ 5,800,000
Subsequent Event [Member] | Warrant Exercise Agreements [Member] | Common Stock [Member]
Subsequent Event [Line Items]
Warrant exercise price per share		$ 0.72
Warrants exercisable term		5 years 6 months
Subsequent Event [Member] | Warrant Exercise Agreements [Member] | Common Stock [Member] | Maximum [Member]
Subsequent Event [Line Items]
Warrants to purchase common stock		6,898,224
Subsequent Event [Member] | Exchange Agreement [Member] | Exchanging Stockholders [Member]
Subsequent Event [Line Items]
Reimbursement of expenses	$ 25,000
Conversion of stock blocker provision percentage	9.99%
Subsequent Event [Member] | Exchange Agreement [Member] | Exchanging Stockholders [Member] | Common Stock [Member]
Subsequent Event [Line Items]
Conversion of stock, shares converted	3,796,000
Common stock, par value	$ 0.001
Convertible preferred stock, shares issued upon conversion of each share	1,000
Subsequent Event [Member] | Exchange Agreement [Member] | Exchanging Stockholders [Member] | Series X Preferred Stock [Member]
Subsequent Event [Line Items]
Conversion of stock, shares issued	3,796

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