Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 29, 2018	Dec. 30, 2017	Dec. 28, 2018
Exercisable period	3 years 4 months 17 days
Percentage of fair market value of Commons stock date of grant	100.00%
Share based payment award number of shares of common stock for each share	1.5
Total unrecognized compensation cost related to non-vested share-based compensation arrangements		$ 4,800
Cost is expected to be recognized over a weighted average period		2 years 4 months 17 days
Weighted-average grant date fair value of the options granted	$ 2.27	$ 3.68
Total intrinsic value of options exercised	$ 100	$ 300
Unvested restricted stock awarded	628,125	212,538
Restricted Stock Units (RSUs)
Grant of non-qualified stock option	$ 40
The intrinsic value of the restricted stock units			$ 4.45
Number of shares, vested	86,941	80,009
Restricted stock units released, intrinsic value	$ 600
Restricted stock units released, Shares withheld	26,181
Restricted stock units released, value withheld	$ 194
Unvested restricted stock awarded	418,750	137,391
Weighted-average grant date fair value of restricted stock awarded	$ 7.79	$ 9.88
1998 Stock Plan
Voting rights on outstanding capital stock	10.00%
Exercise price of option	110.00%
Term of incentive stock options for major stock holders	5 years
Exercisable period	4 years
Maximum term of incentive stock options granted	10 years
Expiration date of option Plan	2008-02
2008 Equity Incentive Plan
Grant of non-qualified stock option	2,850,000
Performance Award \| Restricted Stock Units (RSUs)
Unvested restricted stock awarded	238,200
Weighted-average grant date fair value of restricted stock awarded	$ 7.89

Maximum term of incentive stock options granted.

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Minimum percentage of fair value on grant used to calculate exercise price for major shareholders.

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Minimum percentage of voting power of outstanding capital stock.

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Percentage of fair market value of common stock date of grant.

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- Definition

Share based compensation arrangement by share based payment award Award Expiration Month and Year.

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Share based compensation arrangement by share based payment award major stockholders period.

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Share based compensation arrangement by share based payment award number of shares of common stock for each share.

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Unrecognized cost of unvested share-based compensation awards.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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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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- Definition

The value of restricted shares issued as compensation, net of the value of shares for the payment of withholding taxes. This element is to be used only if shares are used in lieu of cash to satisfy all or a portion of withholding taxes.

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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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The weighted average fair value at grant date for nonvested equity-based awards issued 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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Per share weighted average intrinsic value of equity-based compensation awards not vested. Excludes stock and unit options.

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

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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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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- Definition

Intrinsic value of equity-based compensation awards vested. Excludes stock and unit options.

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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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- Definition

For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

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