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v2.4.1.9

Employee Benefit Plan (Detail) | 12 Months Ended
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Dec. 31, 2014
Employee Benefit Plan |
Maximum percentage of compensation that the employees may contribute to the 401 (k) plan | 60.00%us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Employer matching contribution (as a percent) | 50.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Maximum amount of employees contribution subject to employer's matching contribution | 6.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent

X
- Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration