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Stock-Based Compensation - Stock Option Activity under Two Thousand Six And Two Thousand Sixteen Plan (Details) - Employee Stock Plan, 2006 Plan and 2016 Plan	3 Months Ended
	Apr. 29, 2017 USD ($) $ / shares shares
Number of Shares
Outstanding options at beginning of year | shares	2,524,546
Options canceled | shares	(1,147,398)
Outstanding options at end of quarter | shares	1,377,148
Options exercisable at end of quarter | shares	1,377,148
Weighted-average exercise price per option
Outstanding options at beginning of year | $ / shares	$ 4.98
Options canceled | $ / shares	4.96
Outstanding options at end of quarter | $ / shares	4.97
Options exercisable at end of quarter | $ / shares	$ 4.97
Weighted-average remaining contractual term
Outstanding options at end of quarter	5 years 3 months 18 days
Options exercisable at end of quarter	5 years 3 months 18 days
Aggregate Intrinsic Value
Outstanding options at beginning of year | $	$ 11,286

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

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