Equity Incentive Plans - Additional Information (Details) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2018 USD ($) shares	Jun. 30, 2018 USD ($) shares
Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost \| $	$ 10.1	$ 10.1
Weighted-average remaining expected term		1 year 10 months 24 days
RSU
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average remaining expected term		3 years 3 months 18 days
Unrecognized compensation cost \| $	$ 55.1	$ 55.1
2016 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance	5,629,839	5,629,839
Automatically increase percentage of shares of all classes of company's common stock outstanding	5.00%	5.00%
2016 Equity Incentive Plan \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Automatically increase of shares reserved for issuance	5,500,000	5,500,000
2016 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Automatically increase percentage of shares of all classes of company's common stock outstanding	1.00%	1.00%
2016 Employee Stock Purchase Plan \| Class A Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance	1,117,643	1,117,643
Automatically increase of shares reserved for issuance	1,600,000	1,600,000
Purchase price of common stock, percent		85.00%
Number of shares purchased	125,121	125,121

Common stock capital shares reserved for future issuance annual automatic increase in shares.

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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.

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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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Purchase price of common stock expressed as a percentage of its fair value.

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