Common Stock - Additional Information (Detail) - USD ($)				3 Months Ended		9 Months Ended
	Feb. 25, 2021	Jul. 16, 2020	Mar. 27, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Changes In Equity And Comprehensive Income Line Items [Line Items]
Proceeds from issuance of common stock in public offering, net						$ 52,356,204	$ 25,614,836
Common stock, par or stated value per share				$ 0.0001		$ 0.0001		$ 0.0001
Pre-Funded Warrants [Member]
Changes In Equity And Comprehensive Income Line Items [Line Items]
Number of securities called by warrants or rights				0		0
Common Stock [Member]
Changes In Equity And Comprehensive Income Line Items [Line Items]
Shares of common stock sold					247,865
Exchange Warrants [Member]
Changes In Equity And Comprehensive Income Line Items [Line Items]
Number of securities called by warrants or rights	1,000,000
Exercise price of warrants or rights	$ 0.0001
Common stock, par or stated value per share	$ 0.0001
Common stock exchanged for pre-funded warrants	1,000,000
Number of warrants exercised						0
Ownership percentage	9.99%
Public Offering [Member]
Changes In Equity And Comprehensive Income Line Items [Line Items]
Gross proceeds from offering including exercise of underwriter's option		$ 132,200,000
Public Offering [Member] | Pre-Funded Warrants [Member]
Changes In Equity And Comprehensive Income Line Items [Line Items]
Exercise price of warrants or rights		$ 0.0001
Purchase price of warrants issued		$ 22.9999
Ownership percentage on exercise of warrants without notice, minimum		4.99%
Ownership percentage on exercise of warrants with notice, maximum		19.99%
Notice period to increase ownership percentage on exercise of warrants		61 days
Public Offering [Member] | Common Stock [Member]
Changes In Equity And Comprehensive Income Line Items [Line Items]
Shares of common stock sold		3,369,564
Public offering price, per share		$ 23.00
Public Offering [Member] | Common Stock [Member] | Pre-Funded Warrants [Member]
Changes In Equity And Comprehensive Income Line Items [Line Items]
Number of securities called by warrants or rights		1,630,436
Over-Allotment Option [Member] | Common Stock [Member]
Changes In Equity And Comprehensive Income Line Items [Line Items]
Shares of common stock sold		750,000
Proceeds from issuance of common stock in public offering, net		$ 124,000,000.0
At-The-Market Offering [Member] | Equity Distribution Agreement [Member] | Piper Sandler company and evercore group limited liability company and B Riley Securities inc [Member]
Changes In Equity And Comprehensive Income Line Items [Line Items]
Shares of common stock sold						3,516,510
Proceeds from issuance of common stock in public offering, net						$ 52,400,000
Common stock, par or stated value per share	$ 0.0001
Aggregate offering price	$ 125,000,000.0
Common stock available to be sold				$ 70,900,000		70,900,000
Deferred offering costs				$ 100,000		100,000
Issuance costs						$ 100,000
At-The-Market Offering [Member] | Equity Distribution Agreement [Member] | JMP Securities LLC [Member]
Changes In Equity And Comprehensive Income Line Items [Line Items]
Shares of common stock sold				0		0	3,213,009
Proceeds from issuance of common stock in public offering, net							$ 25,600,000
Common stock, par or stated value per share			$ 0.0001
Aggregate offering price			$ 18,900,000
At-The-Market Offering [Member] | Equity Distribution Agreement [Member] | JMP Securities LLC [Member] | Maximum [Member]
Changes In Equity And Comprehensive Income Line Items [Line Items]
Aggregate offering price			$ 50,000,000.0