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Schedule II - Valuation and Qualifying Accounts - Valuation and Qualifying Accounts (Details) - USD ($)
12 Months Ended
Sep. 26, 2020
Sep. 28, 2019
Sep. 29, 2018
Opening Balance $ 572,000 $ 400,000 $ 359,000
Charged to Expense 1,105,000 389,000 259,000
Deductions [1] 289,000 217,000 218,000
Closing Balance $ 1,388,000 $ 572,000 $ 400,000
[1] Write-offs of uncollectible accounts receivable.