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Note 3 - Revenue (Details Textual) - USD ($) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 27, 2020 | Sep. 29, 2019 | Sep. 30, 2018 | Sep. 24, 2017
Contract with Customer, Liability, Current | $ 60,271,000 | $ 21,720,000 |  |
Contract with Customer, Liability, Revenue Recognized | 21,549,000 |  |  |
Contract with Customer, Asset, after Allowance for Credit Loss, Current, Total | 0 | 1,107,000 |  |
Accounts Receivable, before Allowance for Credit Loss | 66,029,000 | 47,863,000 |  |
Accounts Receivable, Allowance for Credit Loss, Ending Balance | $ 13,431,000 | $ 6,434,000 | $ 4,806,000 | $ 4,796,000

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