Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Defined Contribution Plan Disclosure [Line Items]
Matching contribution by the company to the plan			100.00%
Percentage of employees' eligible compensation			6.00%
Plan name			401(k) plan
General and Administrative [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, compensation expense	$ 0.3	$ 0.3	$ 0.7	$ 0.5