Note 16 - Related Parties (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 25, 2023	Mar. 26, 2022	Mar. 25, 2023	Mar. 26, 2022	Sep. 24, 2022
Related Party [Member]
Accounts Payable, Trade	$ 2.8		$ 2.8		$ 2.9
NFI [Member] | Distribution and Shipping Costs [Member]
Related Party Transaction, Amounts of Transaction	13.3	$ 2.9	27.6	$ 4.0
NFI [Member] | Management Services [Member]
Related Party Transaction, Amounts of Transaction	$ 0.2	$ 0.2	$ 0.3	$ 0.3