Note 3 - Stock-based Compensation - Stock-based Compensation Costs (Details) - USD ($)	3 Months Ended
Dec. 28, 2019	Dec. 29, 2018
Stock-based compensation costs	$ 12,775	$ 8,800
Selling, General and Administrative Expenses [Member]
Stock-based compensation costs	11,082	7,596
Product Development Expenses [Member]
Stock-based compensation costs	$ 1,693	$ 1,204

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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