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Note 14 - Allowance for Doubtful Accounts - Valuation and Qualifying Account Information (Details) - USD ($)
12 Months Ended
Sep. 29, 2019
Sep. 30, 2018
Sep. 24, 2017
Allowance for Doubtful Accounts Receivable $ 4,806,000 $ 4,796,000 $ 4,327,000
Additions charged to expense 2,751,000 1,952,000 1,696,000
Deductions from reserves (1,123,000) (1,942,000) (1,227,000)
Allowance for Doubtful Accounts Receivable $ 6,434,000 $ 4,806,000 $ 4,796,000