Note 6 - Income Taxes (Details Textual) - USD ($)	3 Months Ended	6 Months Ended
Sep. 26, 2021	Sep. 27, 2020	Sep. 26, 2021	Sep. 27, 2020
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	$ 22,000	$ 20,000	$ 45,000	$ 33,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total	12,000	14,000	26,000	31,000
Effective Income Tax Rate Reconciliation, Aggregate Effect of Certain Tax Credits, Amount	$ 28,000	$ 4,000	$ 72,000	$ 4,000

Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to aggregate effect of certain tax credits.

No definition available.

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- Definition

Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

+ 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 (c)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-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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