Stock-Based Compensation - Employee Stock Purchase Plan (Details) - Employee Stock Purchase Plan	9 Months Ended
Sep. 30, 2015 USD ($)
Stock-based compensation
Maximum employee salary to purchase shares (in dollars)	$ 25,000
Maximum percentage of employee eligible pay to purchase shares	10.00%
Minimum
Stock-based compensation
Purchase price as a percent of the fair market value	85.00%
Maximum
Stock-based compensation
Purchase price as a percent of the fair market value	100.00%

The highest amount of annual salary that an employee is permitted to utilize with respect to the plan.

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

+ References

No definition available.

+ Details

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