v3.6.0.2

STOCK-BASED COMPENSATION - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Jan. 01, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Shares Available for Grant
Options granted (shares)		(936,000)
Options canceled (shares)		814,728
Number of Shares
Beginning balance (shares)	6,543,162	6,543,162
Options granted (shares)		936,000
Options exercised (shares)		(444,660)
Options forfeited (shares)		(814,728)
Ending balance (shares)		6,219,774	6,543,162
Options Exercisable (shares)		4,086,597
Options vested and expected to vest (shares)		5,964,671
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 6.05	$ 6.05
Options granted (in dollars per share)		6.13
Options exercised (in dollars per share)		2.01
Options forfeited (in dollars per share)		7.57
Ending balance (in dollars per share)		6.15	$ 6.05
Options exercisable (in dollars per share)		5.67
Options vested and expected to vest (in dollars per share)		$ 6.12
Weighted Average Remaining Contractual Life
Weighted average remaining contractual life, period start		6 years 5 months 1 day	7 years 10 days
Weighted average remaining contractual life, period end		6 years 5 months 1 day	7 years 10 days
Weighted average life, options exercisable		5 years 7 months 13 days
Weighted average life, options vested and expected to vest		6 years 4 months 6 days
Aggregate Intrinsic Value
Aggregate intrinsic value, period start	$ 6,570	$ 6,570
Aggregate intrinsic value, period end		6,056	$ 6,570
Aggregate intrinsic value, options exercisable		5,903
Aggregate intrinsic value, options vested and expected to vest		$ 6,046
Weighted average grant date fair value per share of stock options (in dollars per share)		$ 3.15	$ 3.42	$ 5.01
Aggregate grant date fair value		$ 3,000	$ 6,000	$ 6,200
Total intrinsic value of options exercised		1,800	2,400	6,700
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value		$ 7,000	$ 4,100	$ 5,100
2014 Equity Incentive Plan
Shares Available for Grant
Beginning balance (shares)	5,017,525	5,017,525
Authorized (shares)	2,450,865	2,450,865
Options granted (shares)		(936,000)
Options canceled (shares)		814,728
Awards granted (shares)		(3,286,825)
Awards canceled (shares)		1,056,460
Ending balance (shares)		5,116,753	5,017,525
Number of Shares
Options granted (shares)		936,000
Options forfeited (shares)		(814,728)

X

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Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value [Abstract]

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Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term [Abstract]

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Share-based Compensation Arrangement by Share-based Payment Award, Shares Available for Grant [Roll Forward]

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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

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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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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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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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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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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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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding.

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, 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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Value, before forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

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