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Note 6 - Stock-based Compensation - Activity for Stock Options (Details)	3 Months Ended
	May 04, 2019 $ / shares shares
Outstanding (in shares) | shares	950,678
Outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 9.67
Granted (in shares) | shares
Granted, weighted average exercise price (in dollars per share) | $ / shares
Exercised (in shares) | shares	(3,724)
Exercised, weighted average exercise price (in dollars per share) | $ / shares	$ 5.11
Forfeited (in shares) | shares
Forfeited, weighted average exercise price (in dollars per share) | $ / shares
Canceled or expired (in shares) | shares	(17,138)
Canceled or expired, weighted average exercise price (in dollars per share) | $ / shares	$ 7.44
Outstanding (in shares) | shares	929,816
Outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 9.73

X

- Definition

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(4)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

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.

+ References

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-Publisher FASB
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-SubTopic 10
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- Definition

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

+ References

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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 price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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

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