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Stockholders' Equity - Schedule Of Common Stock Shares Reserved For Future Issuance (Details) - shares | Sep. 30, 2017 | Dec. 31, 2016
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Class Of Stock [Line Items] |  |
Total number of shares reserved for future issuance | 8,121,448 | 7,526,060
Common stock warrants issued and outstanding |  |
Class Of Stock [Line Items] |  |
Total number of shares reserved for future issuance | 127,918 | 217,245
Options Issued and Outstanding |  |
Class Of Stock [Line Items] |  |
Total number of shares reserved for future issuance | 2,765,902 | 2,977,218
Unvested restricted stock units |  |
Class Of Stock [Line Items] |  |
Total number of shares reserved for future issuance | 453,063 | 105,529
Shares Available for Grant Under Future Stock Plans |  |
Class Of Stock [Line Items] |  |
Total number of shares reserved for future issuance | 4,774,565 | 4,226,068

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- Definition Aggregate number of common shares reserved for future issuance. + 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 + Details
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