Stockholders' Equity - Additional Information (Detail) - USD ($)		1 Months Ended			12 Months Ended
	Aug. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Apr. 30, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividends declared					$ 0
Net proceeds from issuance of common stock					$ 3,040,000	$ 96,779,000
Equity, debt, warrants and units, maximum aggregate offering amount		$ 200,000,000.0	$ 150,000,000.0
At-The-Market Offering [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common stock upon public offering, net of issuance costs, shares					565,938	9,267,760
Net proceeds from issuance of common stock					$ 3,000.0	$ 97,300,000
Equity, debt, warrants and units, maximum aggregate offering amount		200,000,000.0	150,000,000.0
Equity, debt, warrants and units, maximum issued and sale		$ 50,000,000.0	$ 50,000,000.0
Amount of common stock available for sale	$ 50,000,000.0
Common Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common stock upon public offering, net of issuance costs, shares					565,938	9,267,760	5,175,000
Underwriting Agreement [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Net proceeds from issuance of common stock				$ 53,200,000
Underwriting Agreement [Member] | Common Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common stock upon public offering, net of issuance costs, shares				5,175,000
Number of additional common stock issued				675,000
Common stock, offering price per share				$ 11.00