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Convertible Preferred Stock (Details) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 30, 2015 $ / shares shares | Mar. 13, 2015 USD ($) $ / shares shares | Jun. 30, 2015 $ / shares shares | Sep. 30, 2015 USD ($) $ / shares shares | Dec. 31, 2014 $ / shares shares
Preferred Stock, Number of Shares, Par Value and Other Disclosures |  |  |  |  |
Common Stock issued upon conversion of Preferred Stock | 9,029,549 |  |  |  |
Preferred Stock, Shares Authorized |  |  |  | 5,000,000 | 0
Preferred Stock, Par or Stated Value Per Share | $ / shares |  |  |  | $ 0.001 | $ 0.001
Proceeds from issuance of preferred stock, net of issuance costs | $ |  |  |  | $ 12,331 |
Preferred Stock, Shares Issued |  |  |  | 0 | 0
Preferred Stock, Shares Outstanding |  |  |  | 0 | 0
Minimum number of series used to issue preferred stock |  |  |  | 1 |
Initial public offering |  |  |  |  |
Preferred Stock, Number of Shares, Par Value and Other Disclosures |  |  |  |  |
Common Stock issued upon conversion of Preferred Stock |  |  | 9,029,549 |  |
Share price (in dollars per share) | $ / shares | $ 12.00 |  | $ 12.00 |  |
Series B Convertible Preferred Stock |  |  |  |  |
Preferred Stock, Number of Shares, Par Value and Other Disclosures |  |  |  |  |
Preferred Stock, Shares Authorized |  | 56,026,590 |  |  |
Share price (in dollars per share) | $ / shares |  | $ 0.9503 |  |  |
Proceeds from issuance of preferred stock, net of issuance costs | $ |  | $ 12,300 |  |  |
Preferred Stock, Shares Issued |  | 13,062,965 |  |  |

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- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + 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 210.5-02.28) -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 29 -Article 5 + Details
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