Commitments and Contingencies (Details) ft² in Thousands, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 02, 2022 USD ($)	Jul. 03, 2021 USD ($)	Jul. 02, 2022 USD ($)	Jul. 03, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2020 ft² building
Loss Contingencies [Line Items]
Estimated litigation liability	$ 900		$ 900			$ 800
Revenue	174,198	$ 160,192	337,679	$ 317,343
Cost of sales	139,556	123,410	270,562	247,461
Damage from Facility Fire
Loss Contingencies [Line Items]
Loss contingency, receivable, proceeds	0		3,000
Structural Systems
Loss Contingencies [Line Items]
Revenue	64,466	$ 57,395	130,481	$ 115,442
El Mirage and Monrovia, California | Structural Systems
Loss Contingencies [Line Items]
Reserve for estimated liability	1,500		1,500			1,500
West Covina, California | Structural Systems
Loss Contingencies [Line Items]
Reserve for estimated liability	400		400			400
West Covina, California | Structural Systems | Minimum
Loss Contingencies [Line Items]
Possible loss	400		400
West Covina, California | Structural Systems | Maximum
Loss Contingencies [Line Items]
Possible loss	3,100		3,100
Facility Fire In Guaymas, Mexico | Damage from Facility Fire
Loss Contingencies [Line Items]
Number of buildings | building							2
Real estate property (in sqft) | ft²							62
Loss contingency, receivable, proceeds					$ 13,500
Facility Fire In Guaymas, Mexico | Damage from Facility Fire | Property, Plant and Equipment
Loss Contingencies [Line Items]
Carrying value of impaired assets					7,100
Facility Fire In Guaymas, Mexico | Damage from Facility Fire | Inventories
Loss Contingencies [Line Items]
Carrying value of impaired assets					3,400
Facility Fire In Guaymas, Mexico | Damage from Facility Fire | Revision of Prior Period, Reclassification, Adjustment
Loss Contingencies [Line Items]
Revenue					800
Cost of sales					$ 500
Accrued Liabilities
Loss Contingencies [Line Items]
Estimated litigation liability	900		$ 900			$ 800
Additional accrued liabilities	$ 100