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Product Warranty Reserves (Tables)
 12 Months Ended
Dec. 28, 2019
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability [Table Text Block]
The following is a summary of the Company's product warranty activity:
 
2019
 
2018
Product warranty reserve at beginning of period
$
1,069

 
$
1,173

Warranty liabilities accrued
1,667

 
2,341

Warranty liabilities settled
(1,695
)
 
(2,380
)
Changes for pre-existing warranty liabilities
(39
)
 
(65
)
Product warranty reserve at end of period
$
1,002

 
$
1,069