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Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Line Items]
Increase in valuation allowance	$ 124,000,000.0	$ 19,900,000	$ 34,400,000
Deferred tax asset for temporary difference	78,700,000
Federal and state net operating loss carryforwards	134,033,000	91,267,000
Foreign net operating loss carryforwards	$ 32,417,000	$ 37,786,000
Percentage of ownership changes	0.00%
Unrecognized tax benefits	$ 48,600,000
Accrued interest, unrecognized tax benefits	0		$ 0
Unrecognized tax benefits that would affect effective tax rate	$ 500,000
Unrecognized tax benefits description	The Company does not anticipate a material change to its unrecognized tax benefits over the next twelve months that would affect the Company’s effective tax rate.
Earliest Tax Year [Member]
Income Taxes [Line Items]
Foreign statute of limitation generally remains open in the year	2011
Latest Tax Year [Member]
Income Taxes [Line Items]
Foreign statute of limitation generally remains open in the year	2020
Foreign net operating loss [Member]
Income Taxes [Line Items]
Foreign net operating loss carryforwards	$ 172,900,000
Foreign net operating loss [Member] \| Minimum [Member]
Income Taxes [Line Items]
Operating loss carryforwards expiration year	2021
Foreign net operating loss [Member] \| Maximum [Member]
Income Taxes [Line Items]
Operating loss carryforwards expiration year	2030
Federal [Member]
Income Taxes [Line Items]
Federal and state net operating loss carryforwards	$ 606,800,000
Operating loss carryforwards expiration year	2026
Other tax credit carryforwards	$ 66,900,000
Other tax credit carryforwards expiration year	2021
State [Member]
Income Taxes [Line Items]
Federal and state net operating loss carryforwards	$ 133,600,000
Operating loss carryforwards expiration year	2021
State [Member] \| California [Member]
Income Taxes [Line Items]
Other tax credit carryforwards	$ 32,900,000