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Stock-Based Compensation - Stock Option Activity (Details) - USD ($)	9 Months Ended
	Oct. 28, 2017	Oct. 29, 2016
Number of Shares
Options granted	30,000	8,522
Employee Stock Plan, 2006 Plan and 2016 Plan
Number of Shares
Outstanding options at beginning of year	2,524,546
Options granted	30,000
Options canceled	(1,259,579)
Outstanding options at end of quarter	1,294,967
Options exercisable at end of quarter	1,294,967
Weighted-average exercise price per option
Outstanding options at beginning of year	$ 4.98
Options granted	1.85
Options canceled	5.05
Outstanding options at end of quarter	4.82
Options exercisable at end of quarter	$ 4.82
Weighted-average remaining contractual term
Outstanding options at end of quarter	4 years 9 months 19 days
Options exercisable at end of quarter	4 years 9 months 19 days
Aggregate Intrinsic Value
Outstanding options at beginning of year	$ 11,286
Outstanding options at end of quarter	$ 3,000

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

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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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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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