Subsequent Events - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended	2 Months Ended	12 Months Ended
	Feb. 18, 2021	Feb. 12, 2021	Dec. 31, 2019	Feb. 28, 2021	Dec. 31, 2020	Dec. 31, 2019
Subsequent Event [Line Items]
Sale of common stock shares			3,633,334
Proceeds from issuance of common stock, net of issuance costs			$ 25,100		$ 2,266	$ 25,127
Subsequent Event [Member] | Equity Distribution Agreement [Member]
Subsequent Event [Line Items]
Sale of common stock shares				197,949
Proceeds from issuance of common stock, net of issuance costs				$ 1,600
Subsequent Event [Member] | Purchase Agreement [Member]
Subsequent Event [Line Items]
Sale of common stock shares		2,875,000
Sale of stock price per share		$ 7.29
Gross proceeds from issuance of common stock	$ 21,000