Stockholders' Equity - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Mar. 11, 2020	Feb. 29, 2020
Class of Stock [Line Items]
Stock Issued During Period, Value, Employee Stock Purchase Plan		$ 23,437	$ 15,106
Common stock, shares outstanding (in shares)		3,793,739	1,400,674
Common Stock, Voting Rights		Each share of common stock entitles the holder to one vote on all matters submitted to a vote of the Company’s stockholders.
Common stock, par value (in dollars per share)		$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)		25,000,000	25,000,000
Proceeds from Issuance or Sale of Equity		$ 4,166,868	$ 15,106
Common Stock
Class of Stock [Line Items]
Stock Issued During Period, Value, Employee Stock Purchase Plan		$ 2	$ 1
Stock Issued During Period, Shares, Employee Stock Purchase Plans		13,446	4,331
Stock Issued During Period, Shares, New Issues		2,348,619
Common Stock From Series D Preferred Stock
Class of Stock [Line Items]
Convertible preferred stock, shares issued upon conversion (in shares)			534,333
Common Stock From Series F Preferred Stock
Class of Stock [Line Items]
Convertible preferred stock, shares issued upon conversion (in shares)			123,981
At The Market Offering Program [Member]
Class of Stock [Line Items]
Proceeds from Issuance of Common Stock		$ 4,143,431
Stock Issued During Period, Shares, New Issues		2,348,619
Maximum Aggregate Offering Price					$ 4,482,000
Common stock, par value (in dollars per share)					$ 0.0001
Series F Convertible Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Shares Outstanding		0	0
Preferred stock, shares designated (in shares)		10,621	10,621
Conversion of Stock, Shares Converted			3,260.70
Series D Convertible Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Shares Outstanding		0	0
Preferred stock, shares designated (in shares)		21,300	21,300
Conversion of Stock, Shares Converted			14,052.93
Series B Convertible Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Shares Outstanding		200	200
Preferred stock, shares designated (in shares)		147,000	147,000
Common Stock
Class of Stock [Line Items]
Stock Issued During Period, Value, Employee Stock Purchase Plan		$ 23,437
Stock Issued During Period, Shares, Employee Stock Purchase Plans		13,446
Separation Agreement [Member] | Common Stock
Class of Stock [Line Items]
Shares issued during period (in shares)	31,000
Stock Issued During Period, Value, Other	$ 43,751
Share price (in dollars per share)				$ 1.41