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Product Warranty Reserves (Tables)
 12 Months Ended
Dec. 29, 2018
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability [Table Text Block]
The following is a summary of the Company's product warranty activity:
 
2018
 
2017
 
 
 
(As Adjusted)

Product warranty reserve at beginning of period
$
1,173

 
$
1,165

Warranty liabilities accrued
2,341

 
2,491

Warranty liabilities settled
(2,380
)
 
(2,931
)
Changes for pre-existing warranty liabilities
(65
)
 
448

Product warranty reserve at end of period
$
1,069

 
$
1,173