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Note 8 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020	Sep. 27, 2020
Income Tax Expense (Benefit), Total	$ 1,366,000	$ 368,000	$ 7,106,000	$ (92,000)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total	$ 5,103,000	$ (359,000)	$ 26,636,000	$ (90,000)
Effective Income Tax Rate Reconciliation, Percent, Total	26.80%	102.50%	26.70%	102.20%
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total					$ 46,066,000

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