Note 4 - Revenue Recognition - Disaggregation of Net Sales by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jul. 02, 2022	Jul. 03, 2021	Jul. 02, 2022	Jul. 03, 2021
Revenue	$ 227,173	$ 160,739	$ 618,841	$ 419,343
UNITED STATES
Revenue	226,038	158,710	614,306	413,826
Non-US [Member]
Revenue	1,135	2,029	4,535	5,517
Welded Wire Reinforcement [Member]
Revenue	131,764	96,422	378,808	252,371
Prestressed Concrete Strand [Member]
Revenue	$ 95,409	$ 64,317	$ 240,033	$ 166,972

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