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Schedule II - Supplemental Schedule Of Valuation And Qualifying Accounts (Details) - Allowance for Doubtful Accounts [Member] - USD ($)
12 Months Ended
Sep. 30, 2017
Sep. 24, 2016
Sep. 26, 2015
Valuation and Qualifying Accounts Disclosure [Line Items]      
BALANCE AT BEGINNING OF YEAR $ 358,293 $ 400,248 $ 307,029
CHARGED TO COST AND EXPENSES 172,846   250,000
DEDUCTIONS [1] 225,559 41,955 156,781
BALANCE AT END OF YEAR $ 305,580 $ 358,293 $ 400,248
[1] Uncollectible accounts written off, net of recoveries.