Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	Oct. 03, 2022	Feb. 23, 2022	Sep. 30, 2022
Equity, Class of Treasury Stock [Line Items]
Common stock, issued and sold		3,880,000
Net proceeds from issuance of common stock and exercise of overallotment		$ 10.0
After deduction of underwriting discounts and estimated other offering expenses		$ 0.9
Pre-funded Warrants [Member]
Equity, Class of Treasury Stock [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 0.0001	$ 0
Pre-funded Warrants [Member] | Maximum [Member]
Equity, Class of Treasury Stock [Line Items]
Warrants issued (in shares)		3,880,000
Common Warrants [Member] | Maximum [Member]
Equity, Class of Treasury Stock [Line Items]
Warrants issued (in shares)		7,760,000
Common Stock Warrants [Member]
Equity, Class of Treasury Stock [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 1.41	$ 1.41
Common Stock, Voting Rights		4.99
Common Stock Warrants [Member] | Maximum [Member]
Equity, Class of Treasury Stock [Line Items]
Date from which Warrants or Rights Exercisable		Aug. 23, 2027
Common Stock Warrants [Member] | Minimum [Member]
Equity, Class of Treasury Stock [Line Items]
Date from which Warrants or Rights Exercisable		Aug. 23, 2022
Subsequent Event [Member] | ATM Facility [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock, issued and sold	2,000,000
After deduction of underwriting discounts and estimated other offering expenses	$ 0.1
Subsequent Event [Member] | ATM Facility [Member] | Maximum [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock shares subscribed but not issued	15,661,000
Follow-on Public Offering [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock, issued and sold		3,880,000
Common stock issued price per share		$ 1.41
Net proceeds from issuance of common stock and exercise of overallotment		$ 10.0
After deduction of underwriting discounts and estimated other offering expenses		$ 0.9
Follow-on Public Offering [Member] | Pre-funded Warrants [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock issued price per share		$ 1.4099
Follow-on Public Offering [Member] | Pre-funded Warrants [Member] | Maximum [Member]
Equity, Class of Treasury Stock [Line Items]
Warrants issued (in shares)		3,880,000
Follow-on Public Offering [Member] | Common Warrants [Member] | Maximum [Member]
Equity, Class of Treasury Stock [Line Items]
Warrants issued (in shares)		7,760,000