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Schedule II - Valuation and Qualifying Accounts
12 Months Ended
Sep. 29, 2018
Notes to Financial Statements  
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
 
       
Opening
   
Charged to
   
 
 
 
 
 
Closing
 
Year
 
Description
 
Balance
   
Expense
   
Deductions
 
 
 
Balance
 
                                       
2018
 
Allowance for doubtful accounts
  $
359,000
    $
259,000
    $
218,000
 
(1)
  $
400,000
 
                                       
2017
 
Allowance for doubtful accounts
  $
571,000
    $
122,000
    $
334,000
 
(1)
  $
359,000
 
                                       
2016
 
Allowance for doubtful accounts
  $
304,000
    $
525,000
    $
258,000
 
(1)
  $
571,000
 
 
                         
                         
(
1
) Write-offs of uncollectible accounts receivable.