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Note 8 - Income Taxes (Details Textual)	12 Months Ended
	May 01, 2021 USD ($)
Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions	$ 53,000
Changes in Income Tax if All Uncertain Tax Positions Prevail	1,700,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	258,000
Unrecognized Tax Benefits, Period Increase (Decrease), Total	$ (9,000)
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Open Tax Year	2016 2017 2018 2019 2020 2021
State and Local Jurisdiction [Member]
Open Tax Year	2014 2015 2016 2017 2018 2019 2020 2021

X

- Definition

The total amount of future income tax change that would occur if all uncertain tax positions prevail.

+ References

No definition available.

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X

- Definition

Tax year that remains open to examination under enacted tax laws, in YYYY format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319

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X

- Definition

Amount of decrease in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319

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- Definition

Amount of interest expense accrued for an underpayment of income taxes.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319

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- Definition

Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319

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