Note 4 - Revenue - Disaggregation By Revenue (Details) - USD ($)	3 Months Ended
Dec. 26, 2020	Dec. 28, 2019
Revenue	$ 166,925	$ 665,925
Engineering Services [Member]
Revenue		408,824
Equipment Sales [Member]
Revenue	$ 166,925	$ 257,101

Amount, including 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