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ALLOWANCE FOR DOUBTFUL ACCOUNTS (Tables)
 3 Months Ended
Dec. 27, 2019
Receivables [Abstract]  
Allowance for Credit Losses on Financing Receivables
A summary follows of activity in the allowance for doubtful accounts during the three months ended December 27, 2019 and December 28, 2018:
 
 
Three Months Ended
Allowance for doubtful accounts
 
December 27,
2019
 
December 28,
2018
(in thousands)
 
 
 
 
Allowance, beginning of period
 
$
71

 
$
85

Increase in provision for doubtful accounts
 
28

 
26

Write-offs
 
—

 
—

Allowance, end of period
 
$
99

 
$
111