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Allowance for Doubtful Accounts
 9 Months Ended
Sep. 26, 2015
Receivables [Abstract]  
Allowance for Doubtful Accounts
Allowance for Doubtful Accounts

A reconciliation of the changes in our allowance for doubtful accounts receivable for the nine months ended September 26, 2015 and September 27, 2014, respectively, is as follows (in thousands):

 
 
September 26,
2015
 
September 27,
2014
Balance at beginning of period
$
266

 
$
265

Additions
—

 
5

Reductions
(11
)
 
(4
)
Balance at end of period
$
255

 
$
266