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Income Taxes - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Taxes [Line Items]      
Provision (benefit) for income taxes $ 4,127,000 $ 3,423,000 $ 3,715,000
Effective income tax rate 76.80% 12.90% 14.70%
Effective income tax rate, exclusive of discrete items 79.20% 9.50% 13.60%
Discrete tax benefit (expenses) $ 100,000    
Net deferred tax liabilities 2,034,000 $ 2,293,000  
Deferred tax liability, undistributed earnings of foreign subsidiaries 206,000,000    
De-recognized UTP 49,700 2,100,000  
Unrecognized tax positions, recognized 100,000 1,800,000  
Interest expense relating to UTPs 67,900   $ 150,000
Valuation allowance 49,300,000 $ 100,900,000  
Valuation allowance (51,600,000)    
U.S. federal net operating loss carryforwards $ 36,800,000    
U.S. federal net operating loss carryforwards, expiration period Dec. 31, 2033    
Foreign tax credit carryforwards $ 19,200,000    
Foreign tax credit carryforwards, expiration year 2022    
Federal research and development tax credit carryforwards $ 500,000    
Federal research and development tax credit carryforwards, expiration year 2029    
State research and development tax credit carryforwards $ 100,000    
State Of California      
Income Taxes [Line Items]      
U.S. federal net operating loss carryforwards $ 124,200,000    
U.S. federal net operating loss carryforwards, expiration period Dec. 31, 2031    
ASU 2015-17 | Restatement Adjustment      
Income Taxes [Line Items]      
Current deferred tax liabilities $ (2,700,000)    
Non-current deferred tax assets $ (400,000)