Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Line Items]
Penalties accrued related to unrecognized tax benefits	$ (5)	$ (1)
Interest accrued related to unrecognized tax benefits	(21)	2
Recognized total liability for penalties	7	12
Recognized total liability for interest	14	35
Valuation allowance	62,699	62,492
GILTI income	$ 0	500
Operating loss carryforwards, expiration end year	2040
Liabilities for unrecognized tax benefits	$ 2,300	2,700
Amount of unrecognized tax benefits, which, if recognized, would affect the tax rate	100	$ 100
Federal
Income Taxes [Line Items]
Operating loss carryforwards	119,400
State
Income Taxes [Line Items]
Operating loss carryforwards	45,900
Foreign
Income Taxes [Line Items]
Operating loss carryforwards	$ 73,600