Note 9 - Stock-based Compensation - Stock Option Valuation Assumptions (Details) - Share-Based Payment Arrangement, Option [Member]	12 Months Ended
	Sep. 30, 2023	Oct. 01, 2022	Oct. 02, 2021
Expected term (in years) (Year)	4 years 4 months 6 days	4 years 7 months 9 days	4 years 10 months 13 days
Risk-free interest rate	4.27%	3.03%	0.68%
Expected volatility	49.61%	49.63%	50.34%
Expected dividend yield	0.40%	0.34%	0.42%