Note 15. Equity Incentive Plans and Employee Benefits (Details) - Restricted Stock Awards and Restricted Stock Units Activities (USD $)	3 Months Ended
Aug. 03, 2013	May 04, 2013
Restricted Stock Awards (RSAs) [Member]
Note 15. Equity Incentive Plans and Employee Benefits (Details) - Restricted Stock Awards and Restricted Stock Units Activities [Line Items]
Number (in Shares)	143,548	163,311
Grant-Date Fair Value	$ 8.60	$ 8.71
Aggregate Value	$ 1,234,513	$ 1,422,439
Number - Vested (in Shares)	(10,980)	(6,588)
Grant-Date Fair Value - Vested	$ 6.83	$ 9.50
Number - Cancelled (in Shares)		(13,175)
Grant-Date Fair Value - Cancelled		$ 9.50
Number (in Shares)	132,568	143,548
Grant-Date Fair Value	$ 8.75	$ 8.60
Aggregate Value	$ 1,159,970	$ 1,234,513
Restricted Stock Units (RSUs) [Member]
Note 15. Equity Incentive Plans and Employee Benefits (Details) - Restricted Stock Awards and Restricted Stock Units Activities [Line Items]
Number (in Shares)	550,331	632,262
Grant-Date Fair Value	$ 6.16	$ 6.28
Aggregate Value	$ 3,390,039	$ 3,970,605
Number - Granted (in Shares)	143,536	37,675
Grant-Date Fair Value - Granted	$ 5.12	$ 4.65
Number - Vested (in Shares)	(56,952)	(44,024)
Grant-Date Fair Value - Vested	$ 6.23	$ 6.14
Number - Cancelled (in Shares)	(49,411)	(75,582)
Grant-Date Fair Value - Cancelled	$ 6.36	$ 6.39
Number (in Shares)	587,504	550,331
Grant-Date Fair Value	$ 5.88	$ 6.16
Aggregate Value	$ 3,455,878	$ 3,390,039

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(3)

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(3)

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Per share weighted average intrinsic value of equity-based compensation awards not vested. Excludes stock and unit options.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Topic 718

-SubTopic 10

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(i)-(ii)

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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-Subparagraph (c)(2)(iii)(2)

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(2)

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