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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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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 |  |

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