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Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 USD ($) Customer | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
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 |  |
Vesting period | 3 years |  |
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 |  |
Goodwill Impairment | $ 0 |  |
Increase (decrease) in valuation allowance on state tax credit carryforwards | (20,636) | $ (339) | $ (395)
Valuation allowance | $ 6,127 | $ 26,763 | $ 27,102
Minimum percentage of recognition of tax benefits from uncertain tax positions | 50.00% |  |
Customer Concentration Risk [Member] | Accounts Receivable [Member] |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |
Number of customers comprising of Accounts Receivable | Customer | 2 |  |
Customer Concentration Risk [Member] | Customer A [Member] | Sales Revenue, Net [Member] |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |
Concentration risk, percentage | 18.00% | 19.00% | 17.00%
Customer Concentration Risk [Member] | Customer B [Member] | Sales Revenue, Net [Member] |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |
Concentration risk, percentage | 13.00% | 13.00% | 12.00%
Customer Concentration Risk [Member] | Semiconductor Products [Member] | Sales Revenue, Net [Member] |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |
Concentration risk, percentage | 69.00% | 70.00% | 68.00%
Selling, General and Administrative Expenses [Member] |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |
Net foreign exchange gains and losses from re-measurement | $ (1,388) | $ (314) | $ (1,937)
Minimum [Member] |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |
Intangible assets amortized period | 2 years |  |
Minimum [Member] | Credit Concentration Risk [Member] | Accounts Receivable [Member] |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |
Concentration risk, percentage | 10.00% |  |
Minimum [Member] | Buildings [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] | Buildings [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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