Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Taxes [Line Items]
CARES Act income tax refund		$ 6,500
Effective income tax rate	1.90%		1.70%	0.40%	(15.20%)
Provision (Benefit) for income taxes	$ 915		$ (585)	$ 39	$ 1,253
Internal Revenue Service (IRS)
Income Taxes [Line Items]
Minimum change in ownership percentage				50.00%
Measurement of change in ownership period				3 years
Minimum change in ownership percentage held by shareholders directly or indirectly				5.00%
Maximum
Income Taxes [Line Items]
Provision (Benefit) for income taxes				$ 100