Stockholders' Equity - Open Market Sale Agreement - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	May 05, 2020	May 04, 2020	Aug. 17, 2018
Common Stock [Member]
Equity Offering [Line Items]
Number of shares of common stock sold in public offering			2,941,000	638,000
Open Market Sale Agreement [Member] | Common Stock [Member]
Equity Offering [Line Items]
Net proceeds from sale of common stock			$ 70.0
Jefferies LLC [Member] | Open Market Sale Agreement [Member] | Common Stock [Member]
Equity Offering [Line Items]
Number of shares of common stock sold in public offering	0	0	2,941,517	638,341
Net proceeds from sale of common stock			$ 30.0	$ 9.9
Maximum [Member] | Jefferies LLC [Member] | Open Market Sale Agreement [Member]
Equity Offering [Line Items]
Aggregate offering price					$ 175.0	$ 75.0	$ 75.0
Percentage of commission of gross proceeds from the sale of Shares			3.00%
Additional aggregate offering price					$ 100.0