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Income Taxes - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 22, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Taxes [Line Items]            
Increase in valuation allowance     $ 30,500,000 $ 12,300,000   $ 22,000,000
Federal and state net operating loss carryforwards     71,256,000 42,900,000    
Foreign net operating loss carryforwards     $ 15,052,000 $ 11,704,000    
Tax at statutory federal rate 35.00%   34.00% 34.00% 34.00%  
Reduction in deferred tax assets     $ 55,200,000      
Percentage of ownership changes     0.00%      
Unrecognized tax benefits     $ 23,300,000      
Unrecognized tax benefits that would affect effective tax rate     400,000      
Accrued interest, unrecognized tax benefits     $ 0 $ 0    
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     2008      
Latest Tax Year [Member]            
Income Taxes [Line Items]            
Foreign statute of limitation generally remains open in the year     2017      
ASU 2016-09 [Member]            
Income Taxes [Line Items]            
Increase in valuation allowance     $ 19,500,000      
Retrospective increase in deferred tax assets for previously unrecognized excess tax benefits     19,500,000      
Scenario, Forecast [Member]            
Income Taxes [Line Items]            
Tax at statutory federal rate   21.00%        
Foreign net operating loss [Member]            
Income Taxes [Line Items]            
Foreign net operating loss carryforwards     $ 63,500,000      
Foreign net operating loss [Member] | Minimum [Member]            
Income Taxes [Line Items]            
Operating loss carryforwards expiration year     2018      
Foreign net operating loss [Member] | Maximum [Member]            
Income Taxes [Line Items]            
Operating loss carryforwards expiration year     2027      
Federal [Member]            
Income Taxes [Line Items]            
Federal and state net operating loss carryforwards     $ 306,000,000      
Operating loss carryforwards expiration year     2026      
Other tax credit carryforwards     $ 38,800,000      
Other tax credit carryforwards expiration year     2018      
State [Member]            
Income Taxes [Line Items]            
Federal and state net operating loss carryforwards     $ 143,400,000      
Operating loss carryforwards expiration year     2018      
State [Member] | California [Member]            
Income Taxes [Line Items]            
Other tax credit carryforwards     $ 22,900,000