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Product Warranty Reserves
 9 Months Ended
Sep. 26, 2020
Product Warranties Disclosures [Abstract]  
Product Warranty Reserves PRODUCT WARRANTY RESERVES
The Company generally provides product warranties related to manufacturing defects and specific performance standards for its products. Product warranty reserves are included in accrued expenses in the Company's Consolidated Condensed Balance Sheets. The following is a summary of the Company's product warranty activity:
Three Months EndedNine Months Ended
 September 26,
2020		September 28,
2019		September 26,
2020		September 28,
2019
Product warranty reserve at beginning of period$910 $1,082 R$1,002 $1,069 
Warranty liabilities accrued165 260 608 1,403 
Warranty liabilities settled(128)(323)(663)(1,414)
Changes for pre-existing warranty liabilities— — — (39)
Product warranty reserve at end of period$947 $1,019 $947 $1,019