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Product Warranty Reserves (Tables)
6 Months Ended
Jun. 26, 2021
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability [Table Text Block] The following is a summary of the Company's product warranty activity:
Three Months EndedSix Months Ended
 June 26,
2021
June 27,
2020
June 26,
2021
June 27,
2020
Product warranty reserve at beginning of period$1,013 $899 $989 $1,002 
Warranty liabilities accrued207 165 396 443 
Warranty liabilities settled(100)(154)(265)(535)
Product warranty reserve at end of period$1,120 $910 $1,120 $910