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Note 7 - Stock-based Compensation (Details Textual) - USD ($)		3 Months Ended		9 Months Ended
	Feb. 11, 2025	Jun. 27, 2026	Jun. 28, 2025	Jun. 27, 2026	Jun. 28, 2025
Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)				3 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)				10 years
Share-Based Payment Arrangement, Expense		$ 141,000	$ 131,000	$ 847,000	$ 828,000
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount		621,000		$ 621,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)				1 year 11 months 23 days
Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Expense		254,000	$ 296,000	$ 1,300,000	$ 1,300,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)				1 year 5 months 15 days
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount		$ 1,200,000		$ 1,200,000
Restricted Stock Units (RSUs) [Member] \| Share-Based Payment Arrangement, Employee [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)				3 years
Restricted Stock Units (RSUs) [Member] \| Director [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)				1 year
The 2025 Equity Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized	800,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant		821,000		821,000