Employee Stock Based Compensation - Summary of the Status of Stock Options (Detail) - $ / shares	12 Months Ended
Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number of Shares, Outstanding Beginning balance	2,624,950
Number of Shares, Exercised	(470,622)	(537,364)	(1,033,750)
Number of Shares, Outstanding Ending balance	2,154,328	2,624,950
Number of Shares, Exercisable Balance	2,146,328
Weighted Average Exercise Price	$ 2.09	$ 2.08
Exercised	2.00
Weighted Average Exercise Price	2.09	$ 2.08
Exercisable at December 30, 2017	$ 2.06
Weighted Average Remaining Life, Outstanding Balance	2 years 4 months 24 days
Weighted Average Remaining Life, Exercisable Balance	2 years 4 months 24 days

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

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

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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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Number of share options (or share units) exercised during the current period.

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