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Schedule II - Valuation and Qualifying Accounts - Valuation and Qualifying Accounts (Details) - USD ($)
12 Months Ended
Sep. 28, 2019
Sep. 29, 2018
Sep. 30, 2017
Opening Balance $ 400,000 $ 359,000 $ 571,000
Charged to Expense 389,000 259,000 122,000
Deductions [1] 217,000 218,000 334,000
Closing Balance $ 572,000 $ 400,000 $ 359,000
[1] Write-offs of uncollectible accounts receivable.