Common Stock - Additional Information (Detail) - USD ($)				1 Months Ended		3 Months Ended	6 Months Ended	12 Months Ended
	Jan. 29, 2021	Jan. 06, 2021	Apr. 02, 2019	Jan. 28, 2021	Jul. 31, 2019	Mar. 31, 2021	Jun. 30, 2022	Dec. 31, 2021	Jun. 21, 2022	Dec. 31, 2020
Class of Stock [Line Items]
Common stock, shares authorized							300,000,000	300,000,000		150,000,000
Common stock, par value							$ 0.001	$ 0.001		$ 0.001
Common stock, dividends declared							$ 0	$ 0
Stock issued during period, value						$ 59,088,000
Common and Pre-funded Warrants [Member]
Class of Stock [Line Items]
Aggregate number of common stock shares issued and sold			1,096,741
Pre-funded Warrants [Member]
Class of Stock [Line Items]
Aggregate number of common stock shares issued and sold			1,096,741
Warrants outstanding exercised					1,096,741
Warrants exercise price			$ 0.01
Common Stock [Member]
Class of Stock [Line Items]
Gross proceeds from common stock shares issued and sold							$ 145,467,000
Stock issued during period, value						$ 46,000
Common Warrants [Member]
Class of Stock [Line Items]
Aggregate number of common stock shares issued and sold			1,096,741
Warrants outstanding							12,935,323
Warrants exercise price							$ 2.00
Common Warrants [Member] | Common and Pre-funded Warrants [Member]
Class of Stock [Line Items]
Purchase price per share			$ 2.01
Private Placement [Member]
Class of Stock [Line Items]
Aggregate number of common stock shares issued and sold			11,838,582
Private Placement [Member] | Common Stock [Member]
Class of Stock [Line Items]
Aggregate number of common stock shares issued and sold			11,838,582
Private Placement [Member] | Common Warrants [Member]
Class of Stock [Line Items]
Aggregate number of common stock shares issued and sold			11,838,582
Purchase price per share			$ 2.01
Securities Purchase Agreement [Member] | Direct Public Offering [Member]
Class of Stock [Line Items]
Common stock, par value		$ 0.001
Aggregate number of common stock shares issued and sold		32,630,983
Expenses fees payable		$ 2,887,000
Gross proceeds from common stock shares issued and sold		$ 35,894,000
Securities Purchase Agreement [Member] | Direct Public Offering [Member] | Common Stock [Member]
Class of Stock [Line Items]
Purchase price per share		$ 1.10
Offering closed date		Jan. 08, 2021
Sales Agreement [Member] | Jones Trading Institutional Services LLC [Member]
Class of Stock [Line Items]
Aggregate number of common stock shares issued and sold				7,174,993
Expenses fees payable				$ 290,000
Gross proceeds from common stock shares issued and sold				$ 9,658,000
ATM Sales Agreement [Member]
Class of Stock [Line Items]
Aggregate number of common stock shares issued and sold							0	5,225,406
Common stock offering price									$ 14,024,100,000
Expenses fees payable								$ 329,000
Gross proceeds from common stock shares issued and sold								$ 10,922,000
ATM Sales Agreement [Member] | Jones Trading Institutional Services LLC and William Blair & Company, LLC [Member] | Maximum [Member]
Class of Stock [Line Items]
Stock issued during period, value	$ 30,000,000
Purchase Agreement [Member] | Jones Trading Institutional Services LLC [Member]
Class of Stock [Line Items]
Aggregate number of common stock shares issued and sold							0	1,375,000
Gross proceeds from common stock shares issued and sold								$ 2,614,000