Common Stock - Additional Information (Detail) - USD ($)		3 Months Ended	9 Months Ended
	Feb. 13, 2020	Sep. 30, 2020	Sep. 30, 2020
Class of Stock [Line Items]
Stock issued during period			1,181,096
Proceeds from exercise of warrants			$ 161,299
Weighted average sale price of shares sold		$ 4.41	$ 4.41
Net proceeds from shares sold			$ 5,049,600
Restricted Stock [Member]
Class of Stock [Line Items]
Number of shares, Vested		379	496
Restricted Stock Units [Member]
Class of Stock [Line Items]
Number of shares, Vested		13,675	19,434
Investor Warrants [Member]
Class of Stock [Line Items]
Warrants exercised		0	21,500
Proceeds from exercise of warrants			$ 161,200
Underwriter Warrants [Member]
Class of Stock [Line Items]
Warrants to purchase common stock	214,300
Common stock warrants, exercise price per share	$ 7.00
Warrants maturity date	Feb. 13, 2025
ATM Facility [Member]
Class of Stock [Line Items]
Stock issued during period		1,001,268
Weighted average sale price of shares sold		$ 4.50	$ 4.50
Net proceeds from shares sold		$ 4,375,000
February 2020 Offering [Member]
Class of Stock [Line Items]
Number of shares entitled to warrant holder	1
February 2020 Offering [Member] | Pre-funded Warrants [Member]
Class of Stock [Line Items]
Warrants to purchase common stock	483,000
Common stock warrants, sale price per share	$ 6.9999
Net proceeds (including paid and unpaid offering expenses) of warrants	$ 13,475,500
Common stock warrants, exercise price per share	$ 0.0001
Warrants exercised date			Mar. 31, 2020
February 2020 Offering [Member] | Investor Warrants [Member]
Class of Stock [Line Items]
Warrants to purchase common stock	2,143,000
Common stock warrants, exercise price per share	$ 7.50
Warrants maturity date	Feb. 13, 2025
February 2020 Offering [Member] | Underwritten Public Offering [Member]
Class of Stock [Line Items]
Stock issued during period	1,660,000
Sale of common stock price per share	$ 7.00
February 2020 Offering [Member] | Underwriters [Member]
Class of Stock [Line Items]
Stock issued during period	321,450
Sale of common stock price per share	$ 6.99
Warrants to purchase common stock	321,450
February 2020 Offering [Member] | Underwriters [Member] | Investor Warrants [Member]
Class of Stock [Line Items]
Common stock warrants, exercise price per share	$ 0.01