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Stock Based Compensation (Details) - shares | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 30, 2015 | Dec. 31, 2014 | Dec. 02, 2013 | Aug. 31, 2010
Stock-based compensation |  |  |  |
Common Stock, shares issued | 40,477,003 | 31,434,272 |  |
Employee Stock Purchase Plan |  |  |  |
Stock-based compensation |  |  |  |
Total number of shares of common stock available for issuance | 581,286 |  |  |
Annual percentage increase in shares of common stock available for issuance | 1.00% |  |  |
Common Stock, shares issued | 111,852 |  |  |
Annual increase in shares of common stock available for issuance (in shares) | 621,814 |  |  |
The 2013 Plan |  |  |  |
Stock-based compensation |  |  |  |
Total number of shares of common stock available for issuance | 6,335,940 |  |  |
Annual percentage increase in shares of common stock available for issuance | 4.00% |  |  |
Awards issued under the plan (in shares) | 1,994,750 |  |  |
Prior Plans |  |  |  |
Stock-based compensation |  |  |  |
Total number of shares of common stock available for issuance | 2,684,456 |  |  | 0
The 2010 Plan |  |  |  |
Stock-based compensation |  |  |  |
Total number of shares of common stock available for issuance |  |  | 0 |

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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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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. + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of share instruments newly issued under a share-based compensation 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 + Details
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- Definition Represents the annual increase in maximum number of shares (or other type of equity) approved (usually by shareholders and board of directors), for awards under the equity-based compensation plan. + References No definition available. + Details
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- Definition Represents the annual percentage increase in maximum number of shares (or other type of equity) approved (usually by shareholders and board of directors), for awards under the equity-based compensation plan. + References No definition available. + Details
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