Quarterly report pursuant to Section 13 or 15(d)

Note 12 - Income Taxes (Details Textual)

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Note 12 - Income Taxes (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Dec. 25, 2021
Dec. 26, 2020
Dec. 25, 2021
Dec. 26, 2020
Sep. 25, 2021
Income Tax Expense (Benefit), Total $ 2,000 $ 0 $ 10,000 $ 2,000  
Effective Income Tax Rate Reconciliation, Percent, Total     1.00% 0.00%  
Unrecognized Tax Benefits, Ending Balance         $ 52,000