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Stock-Based Compensation - Stock Option Activity (Details) - USD ($)	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Number of Shares
Options granted	138,888	0
Employee Stock Plan, 2006 Plan and 2016 Plan
Number of Shares
Outstanding options at beginning of year	1,195,910
Options granted	138,888
Options expired and canceled	(93,244)
Outstanding options at end of quarter	1,241,554
Options exercisable at end of quarter	1,082,666
Weighted-average exercise price per option
Outstanding options at beginning of year	$ 4.80
Options granted	2.50
Options expired and canceled	5.08
Outstanding options at end of quarter	4.52
Options exercisable at end of quarter	$ 4.83
Weighted-average remaining contractual term
Outstanding options at end of quarter	5 years 1 month 6 days
Options exercisable at end of quarter	4 years 6 months
Aggregate Intrinsic Value
Outstanding options at beginning of year	$ 21,750

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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
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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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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For presentations that combine terminations, 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 or that expired.

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Weighted average price of options that were either forfeited or expired.

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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 per share amount at which grantees can acquire shares of common stock by exercise of 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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