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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Schedule Of Significant Accounting Policies [Line Items]      
Minimum period of company's research and development projects 3 months    
Maximum period of company's research and development projects 30 months    
Maximum maturity period of liquid investments 3 months    
Amortization period of leasehold improvements Shorter of the lease term or the estimated useful life of the leased asset    
Increase in valuation allowance on state tax credit carryforwards $ 395 $ 1,022 $ 1,208
Increase in valuation allowance on state tax credit carryforward, Descriptions During 2013, the Company decreased its valuation allowance by $395 primarily related to the expiration of US capital loss carry forwards. As a result, the valuation allowance was $27,102 at December 31, 2013. During 2012, the Company increased its valuation allowance by $1,022 primarily related to an increase in state tax credit carry forwards as management determined it is more likely than not that the deferred tax assets related to these attributes will not be realized. As a result, the valuation allowance was $27,497 at December 31, 2012.  
Valuation allowance 27,102 27,497 26,475
Maximum percentage of recognition of tax benefits from uncertain tax positions 50.00%    
Accounts Receivable [Member]
      
Schedule Of Significant Accounting Policies [Line Items]      
Concentration risk, percentage 10.00%    
Number of customers comprising of Accounts Receivable 2    
Selling, General and Administrative Expenses [Member]
      
Schedule Of Significant Accounting Policies [Line Items]      
Net foreign exchange gains and losses from re-measurement $ 1,937 $ 301 $ 126
One Customer [Member] | Sales [Member]
      
Schedule Of Significant Accounting Policies [Line Items]      
Concentration risk, percentage 17.00% 14.00% 14.00%
Another Customer [Member] | Sales [Member]
      
Schedule Of Significant Accounting Policies [Line Items]      
Concentration risk, percentage 12.00% 10.00% 7.00%
Semiconductor Products [Member] | Sales [Member]
      
Schedule Of Significant Accounting Policies [Line Items]      
Concentration risk, percentage 68.00% 62.00% 61.00%
Minimum [Member]
      
Schedule Of Significant Accounting Policies [Line Items]      
Intangible assets amortized period 2 years    
Minimum [Member] | Building [Member]
      
Schedule Of Significant Accounting Policies [Line Items]      
Estimated useful lives 20 years    
Minimum [Member] | Machinery and Equipment [Member]
      
Schedule Of Significant Accounting Policies [Line Items]      
Estimated useful lives 3 years    
Minimum [Member] | Furniture and Fixtures [Member]
      
Schedule Of Significant Accounting Policies [Line Items]      
Estimated useful lives 3 years    
Minimum [Member] | Office Equipment [Member]
      
Schedule Of Significant Accounting Policies [Line Items]      
Estimated useful lives 3 years    
Maximum [Member]
      
Schedule Of Significant Accounting Policies [Line Items]      
Intangible assets amortized period 10 years    
Maximum [Member] | Building [Member]
      
Schedule Of Significant Accounting Policies [Line Items]      
Estimated useful lives 31 years 6 months    
Maximum [Member] | Machinery and Equipment [Member]
      
Schedule Of Significant Accounting Policies [Line Items]      
Estimated useful lives 7 years    
Maximum [Member] | Furniture and Fixtures [Member]
      
Schedule Of Significant Accounting Policies [Line Items]      
Estimated useful lives 7 years    
Maximum [Member] | Office Equipment [Member]
      
Schedule Of Significant Accounting Policies [Line Items]      
Estimated useful lives 7 years