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Stock-Based Compensation - Additional Information (Details) $ in Millions | 9 Months Ended
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Sep. 30, 2017 USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Total unamortized compensation costs, net of estimated forfeitures related to unvested stock options | $ 10.1
Unamortized compensation costs related to unvested stock options, expected period of recognition | 2 years 6 months
Restricted Stock Units ("RSUs") |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Total unamortized compensation costs, net of estimated forfeitures related to unvested stock options | $ 12.4
Unamortized compensation costs related to unvested stock options, expected period of recognition | 2 years 8 months 13 days
ESPP |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Total unamortized compensation costs, net of estimated forfeitures related to unvested stock options | $ 0.4
Unamortized compensation costs related to unvested stock options, expected period of recognition | 8 months 13 days

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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, 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 (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested options awarded to employees as compensation. + 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 (i) -URI http://asc.fasb.org/extlink&oid=96867065&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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