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Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Increase in valuation allowance	$ 19,900,000	$ 34,400,000	$ 30,500,000
Federal and state net operating loss carryforwards	91,267,000	91,683,000
Foreign net operating loss carryforwards	$ 37,786,000	$ 21,295,000
Tax at statutory federal rate	21.00%	21.00%	34.00%
Percentage of ownership changes	0.00%
Unrecognized tax benefits	$ 32,300,000
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	2010
Latest Tax Year [Member]
Income Taxes [Line Items]
Foreign statute of limitation generally remains open in the year	2019
Maximum [Member]
Income Taxes [Line Items]
Tax at statutory federal rate			35.00%
Foreign net operating loss [Member]
Income Taxes [Line Items]
Foreign net operating loss carryforwards	$ 152,200,000
Foreign net operating loss [Member] \| Minimum [Member]
Income Taxes [Line Items]
Operating loss carryforwards expiration year	2020
Foreign net operating loss [Member] \| Maximum [Member]
Income Taxes [Line Items]
Operating loss carryforwards expiration year	2029
Federal [Member]
Income Taxes [Line Items]
Federal and state net operating loss carryforwards	$ 404,600,000
Operating loss carryforwards expiration year	2026
Other tax credit carryforwards	$ 54,100,000
Other tax credit carryforwards expiration year	2020
State [Member]
Income Taxes [Line Items]
Federal and state net operating loss carryforwards	$ 129,400,000
Operating loss carryforwards expiration year	2020
State [Member] \| California [Member]
Income Taxes [Line Items]
Other tax credit carryforwards	$ 29,400,000