Liquidity and Management's Plan, COVID-19 - Additional Information (Detail) - USD ($) $ in Thousands	Apr. 13, 2020	Sep. 30, 2020	Aug. 31, 2020	Jul. 31, 2020	Apr. 20, 2020	Dec. 31, 2019
Liquidity Uncertainty And Going Concern [Line Items]
Interest payments deferred						$ 5,000
Small Business Administration Payroll Protection Program [Member] | Subsequent Event [Member]
Liquidity Uncertainty And Going Concern [Line Items]
Aggregate loan amount received	$ 10,000
Term Loan Maturity	2 years
Interest rate	1.00%
Treasury Department Payroll Support Program [Member] | Subsequent Event [Member]
Liquidity Uncertainty And Going Concern [Line Items]
Aggregate loan amount received					$ 20,499
Aggregate loan amount receivable					$ 41,000
Treasury Department Payroll Support Program [Member] | Forecast [Member]
Liquidity Uncertainty And Going Concern [Line Items]
Remaining amount to be paid three equal payment		$ 6,833	$ 6,833	$ 6,833