Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Deferred tax assets, valuation allowance	$ 35,200	$ 16,400
Deferred tax assets, valuation allowance, change in amount	18,800	10,900
Operating loss carry forwards	54,800
Tax credit carry forwards	$ 4,600
Tax credit carry forwards, year begin to expiration	2039
Unrecognized tax benefits, accrued interest and penalties	$ 0	$ 0
Earliest Tax Year [Member]
Income Tax Contingency [Line Items]
Open Tax Year	2017
Latest Tax Year [Member]
Income Tax Contingency [Line Items]
Open Tax Year	2019
Domestic Tax Authority [Member]
Income Tax Contingency [Line Items]
Operating loss carry forwards	$ 52,400
State and Local Jurisdiction [Member]
Income Tax Contingency [Line Items]
Operating loss carry forwards, expiry year start	2022
Operating loss carry forwards, expiry year end	2040
Foreign Tax Authority [Member]
Income Tax Contingency [Line Items]
Tax credit carry forwards	$ 500
Tax credit carry forwards, year begin to expiration	2038