Note 3 - Stock-based Compensation - Stock-based Compensation Costs (Details) - USD ($)	3 Months Ended
Dec. 26, 2020	Dec. 28, 2019
Stock-based compensation costs	$ 13,863	$ 12,775
Selling, General and Administrative Expenses [Member]
Stock-based compensation costs	11,373	11,082
Product Development Expenses [Member]
Stock-based compensation costs	$ 2,490	$ 1,693

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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