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Organization, Nature of the Business, COVID-19, Clinical Hold and Basis of Presentation - Additional Information (Detail) - USD ($)			1 Months Ended	3 Months Ended
	May 10, 2022	Aug. 14, 2020	Jul. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Net loss				$ 8,943,000	$ 12,088,000
Accumulated deficit				(125,193,000)		$ (116,250,000)
Cash and cash equivalents				$ 62,600,000
ATM Offering [Member] | Common Stock [Member]
Issuance of common stock | shares			2,342,720
Proceeds from issuance of common stock			$ 20,500,000
ATM Offering [Member] | Common Stock [Member] | Subsequent Event [Member]
Gross sales proceeds under sales agreement remaining amount	$ 29,200,000
ATM Offering [Member] | Common Stock [Member] | Maximum [Member]
Aggregate sale of shares of our common stock		$ 50,000,000

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