Stockholders' Equity - Schedule of Unrecognized Compensation Expense, Net of Forfeitures, Expected to be Recognized Over Weighted-average Periods (Details) $ in Thousands	6 Months Ended
Jun. 30, 2017 USD ($)
Stock options
Stock-based compensation
Unrecognized Compensation Expense	$ 1,355
Unrecognized Compensation Weighted-Average Period (in years)	3 years 1 month 6 days
RSUs
Stock-based compensation
Unrecognized Compensation Expense	$ 310
Unrecognized Compensation Weighted-Average Period (in years)	2 years 8 months 12 days

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.

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

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

+ References

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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.

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