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

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

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Share based compensation arrangement by share based payment award equity instruments other than options grants in period grant date fair value granted value.

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Share based compensation arrangement by share based payment award remaining vesting period.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
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Unrecognized cost of unvested share-based compensation awards.

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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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No definition available.

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- Definition

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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Date the subsidiary or equity investee issued or sold stock, in CCYY-MM-DD format.

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- Definition

Discount rate from fair value on offering date that participants pay for shares.

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- Definition

Weighted average expected volatility rate of share-based compensation awards.

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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.

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No definition available.

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- Definition

Number of additional shares authorized for issuance under an established share-based compensation plan.

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No definition available.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of share instruments newly issued under a share-based compensation plan.

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Percentage of vesting of share-based compensation awards.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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- Definition

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

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No definition available.

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Equity Incentive Plans - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Jan. 02, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Proceeds from exercise of common stock options		$ 1,333	$ 2,670	$ 1,437
Stock-based Compensation		$ 10,459	$ 7,815	$ 5,766
Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Remaining vesting period		3 years
Stock options, exercisable period		10 years
Weighted-average grant date fair value of option granted		$ 5.73	$ 6.05	$ 5.73
Fair value of shares vested		$ 8,300	$ 7,600	$ 5,100
Total intrinsic value of options exercised		2,900	5,400	5,700
Proceeds from exercise of common stock options		$ 1,300	$ 2,700	$ 1,400
Stock option, weighted average volatility rate		38.90%	42.70%	50.50%
Unrecognized compensation cost		$ 26,000
Weighted-average remaining expected term		2 years 9 months 7 days
Stock Option \| One year from the date of requisite service
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage granted		25.00%
RSU
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Remaining vesting period		3 years
Weighted-average remaining expected term		3 years 10 months 24 days
Aggregate grant date fair value of RSUs granted		$ 10,400
Stock-based Compensation		300
Unrecognized compensation cost		$ 10,000
RSU \| One year from the date of requisite service
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage granted		25.00%
2007 Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance		0
2011 Executive Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance		0
2016 Equity Incentive 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		5.00%
2016 Equity Incentive Plan \| Class A Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance		3,800,000
Automatically increase of shares reserved for issuance		5,500,000
2016 Equity Incentive Plan \| Class A Common Stock \| Subsequent Event
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Automatically increase of shares reserved for issuance	1,916,887
2016 Equity Incentive Plan \| Class A Common Stock \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance		11,663,388
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%
2016 Employee Stock Purchase Plan \| Common Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common shares issued		0
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		750,000
Automatically increase of shares reserved for issuance		1,600,000
Purchase price of common stock, percent		85.00%
Number of shares purchased		0
2016 Employee Stock Purchase Plan \| Class A Common Stock \| IPO
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Initial public offering date		Sep. 23, 2016
2016 Employee Stock Purchase Plan \| Class A Common Stock \| Subsequent Event
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Automatically increase of shares reserved for issuance	383,377
2016 Employee Stock Purchase Plan \| Class A Common Stock \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares purchase price discount rate		15.00%