Note 11 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Sep. 24, 2022	Sep. 25, 2021
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 633,461	$ 599,030
Grants Receivable, Current	515,966	$ 0
CARES Act [Member]
Grants Receivable, Current	$ 515,966
Domestic Tax Authority [Member]
Open Tax Year	2018 2019 2020 2021
Operating Loss Carryforwards	$ 5,859,642
Operating Loss Carry Forward Expiration Year	2039
Operating Loss Carryforwards, Not Subject to Expiration	$ 7,276,985
Domestic Tax Authority [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	$ 365,897
Tax Credit Carry Forward Expiration Year	2040
State and Local Jurisdiction [Member]
Open Tax Year	2018 2019 2020 2021
Operating Loss Carryforwards	$ 11,633,242
Operating Loss Carry Forward Expiration Year	2041
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	$ 189,318
Tax Credit Carry Forward Expiration Year	2036