Stockholders' Equity - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Aug. 23, 2019	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
ATM Agreement
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock in a private transaction, net of issuance costs, shares		0	0	0	0
2019 at-the-market issuance sales agreement | B. Riley FBR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Sales commission as a percentage of gross proceeds	3.50%
2019 at-the-market issuance sales agreement | Maximum | B. Riley FBR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock purchase agreement, aggregate amount of common stock agreed to be purchased	$ 75.0