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Stock-based Compensation (Details) - shares | 1 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Apr. 30, 2015 | Sep. 30, 2015 | Dec. 31, 2014 | Jul. 31, 2014
Stock options |  |  |  |
Stock-based compensation |  |  |  |
Vesting period |  | 4 years | 4 years |
Contractual life |  | 10 years | 10 years |
Stock options | Minimum |  |  |  |
Stock-based compensation |  |  |  |
Period following termination date vested options are exercisable |  | 1 month | 1 month |
Stock options | Maximum |  |  |  |
Stock-based compensation |  |  |  |
Period following termination date vested options are exercisable |  | 3 months | 3 months |
2014 Stock Incentive Plan |  |  |  |
Stock-based compensation |  |  |  |
Shares of common stock authorized for issuance (in shares) | 2,700,000 |  |  | 525,700
Increase in number of authorized shares on the first day of each fiscal year, as a percentage of outstanding common stock (as a percent) | 4.00% |  |  |

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- Definition Represents the additional shares that may be authorized for issuance annually under an established share-based compensation plan, expressed as a percentage of the entity's outstanding shares. + References No definition available. + Details
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- Definition Period after the date the vested equity-based award expires during which an employee continues to have the right to exercise an award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + 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 Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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