Note 7 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 27, 2022	Mar. 28, 2021	Mar. 27, 2022	Mar. 28, 2021
Income Tax Expense (Benefit), Total	$ (3,144,000)	$ (571,000)	$ 2,207,000	$ 5,740,000
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total	$ 9,838,000	$ 1,179,000	$ 8,712,000	$ 21,535,000
Effective Income Tax Rate Reconciliation, Percent, Total	32.00%	48.40%	25.30%	26.70%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Open Tax Year			2015 2016 2017 2018 2019 2020 2021