Note 3 - Revenue Recognition - Disaggregation of Net Sales by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jul. 01, 2023	Jul. 02, 2022	Jul. 01, 2023	Jul. 02, 2022
Revenue	$ 165,714	$ 227,173	$ 491,664	$ 618,841
Welded Wire Reinforcement [Member]
Revenue	96,698	131,764	284,044	378,808
Prestressed Concrete Strand [Member]
Revenue	$ 69,016	$ 95,409	$ 207,620	$ 240,033

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details