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Accrued Warranty (Tables)
12 Months Ended
Dec. 30, 2017
Product Warranties Disclosures [Abstract]  
Accrued Warranty
Changes in the accrued warranty for fiscal years ended 2017, 2016 and 2015 are as follows:
 
Fiscal Year Ended
 
December 30,
2017
 
December 31,
2016
 
December 26,
2015
Beginning balance
$
518,000

 
$
518,000

 
$
716,000

Additions
328,000

 
440,000

 
598,000

Claim and reversals
(197,000
)
 
(440,000
)
 
(796,000
)
Ending Balance
$
649,000

 
$
518,000

 
$
518,000