Organization and Significant Accounting Policies - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2013 Segment	Dec. 31, 2012	Dec. 31, 2011
Significant Accounting Policies [Line Items]
Impairment of long-lived asset	$ 0	$ 0	$ 0
Date of annual test of impairment for goodwill	October 1st of each year
Number of operating segments	1
Impairment of goodwill	0
Amount of grants recorded as reduction in research and development expense	3,304	2,849	2,518
Pension contribution rate	10.00%
Percentage of match made by the employer up to a maximum of 6%	100.00%
Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan	6.00%
Maximum percentage contribute by each participant from base remuneration	15.00%
Employee plan contribution	338	313	311
Severance pay expense, net of related income	1,014	826	1,037
Unrecognized compensation expense	5,630
Unrecognized compensation expense, weighted-average period of recognition	1 year 4 months 24 days
Excess tax benefit from equity-based compensation as financing cash flows	0	672	1,290
Impairment loss	0
Allowance for doubtful accounts trade receivable	0	9
Advertising expense	660	791	570
Antidilutive shares excluded from computation of earnings per share	1,732,154	973,919	592,647
Foreign exchange forward contracts \| Derivatives designated as cash flow hedging instruments
Significant Accounting Policies [Line Items]
Notional principal amount of Hedging Contracts	720	5,400
Foreign exchange forward contracts \| Derivatives not qualified as hedging instruments
Significant Accounting Policies [Line Items]
Notional principal amount of Hedging Contracts	$ 0	$ 2,610
Minimum
Significant Accounting Policies [Line Items]
Royalty expenses percentage	3.00%
Maximum
Significant Accounting Policies [Line Items]
Royalty expenses percentage	3.50%
Short-term investments
Significant Accounting Policies [Line Items]
Interest rate bank deposits	1.88%	2.32%	2.06%
Long-term investments
Significant Accounting Policies [Line Items]
Interest rate bank deposits	2.14%	2.40%	2.28%

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Amount of discretionary contributions made by an employer to a defined contribution plan.

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Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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