Subsequent Events - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Mar. 06, 2024	Jan. 19, 2022	Mar. 11, 2021	Jul. 31, 2018
Subsequent Event [Line Items]
Common stock, shares authorized	120,000,000	120,000,000
BARDA [Member]
Subsequent Event [Line Items]
Potential amount additional funding awarded				$ 12.9
Overall potential award increased				47.6
Potential contract amount awarded				$ 60.3		$ 44.2
At-The-Market Offering Program [Member]
Subsequent Event [Line Items]
Issuance of stock, shares	144,476	5,963,294
At-The-Market Offering Program [Member] | Cantor Fitzgerald & Co [Member] | Maximum [Member]
Subsequent Event [Line Items]
Common stock available for issuance					$ 75.0
Subsequent Event [Member] | Two Thousand And Nineteen Inducement Equity Incentive Plan [Member]
Subsequent Event [Line Items]
Common stock, shares authorized			500,000