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Schedule II - Valuation and Qualifying Accounts (Tables)
12 Months Ended
Sep. 26, 2020
Notes Tables  
Summary of Valuation Allowance [Table Text Block]
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
                             
     

Opening

   

Charged to

           

Closing

 

Year

Description

 

Balance

   

Expense

   

Deductions

   

Balance

 
                                   

2020

Allowance for doubtful accounts

  $ 572,000     $ 1,105,000     $ 289,000  (1)    $ 1,388,000  
                                   

2019

Allowance for doubtful accounts

  $ 400,000     $ 389,000     $ 217,000  (1)    $ 572,000  
                                   

2018

Allowance for doubtful accounts

  $ 359,000     $ 259,000     $ 218,000  (1)    $ 400,000