Note 5 - Stock-based Compensation (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 26, 2024	Mar. 28, 2023	Mar. 26, 2024	Mar. 28, 2023	Feb. 08, 2022	May 24, 2018
Share-Based Payment Arrangement, Expense	$ 40,000	$ 43,000	$ 78,000	$ 89,000
The 2018 Omnibus Equity Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)					1,050,000	900,000