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Commitments and Contingencies - Additional Information (Detail) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
	May 21, 2020 USD ($)	Apr. 04, 2021 USD ($)	Jun. 28, 2020 USD ($) Store	Oct. 03, 2021 USD ($)	Sep. 27, 2020 USD ($)	Jan. 03, 2021 USD ($)
Commitments And Contingencies [Line Items]
Received cash condemnation settlement from Orange County Transport Authority pre-tax gain amount					$ 2,500
Cash condemnation settlement from Orange Country Transport Authority	$ 2,500
Loss on property and equipment					$ 237
Number of stores destroyed in civil unrest | Store			7
Loss contingency, total loss			$ 600
Deduction on settlement		$ 300
Proceeds from cash insurance recovery total, net of insurance deductible		1,300
Proceeds from insurance recovery				$ 1,083
Proceeds from insurance recovery - property and equipment		200		249
Gain on recovery of insurance proceeds - lost profit margin and business interruption		500		460
Gain on recovery of insurance proceeds - property and equipment		200		$ 249
Lost Inventory and Profit Margin [Member]
Commitments And Contingencies [Line Items]
Proceeds from insurance recovery		1,000
Business Interruption [Member]
Commitments And Contingencies [Line Items]
Proceeds from insurance recovery		$ 100
Other Income [Member]
Commitments And Contingencies [Line Items]
Received cash condemnation settlement from Orange County Transport Authority pre-tax gain amount			2,500
Loss on property and equipment			$ 200
Selling and Administrative Expenses [Member]
Commitments And Contingencies [Line Items]
Attorneys' fees related to fees settlement						$ 100

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Gain on property insurance recoveries associated with property plant and equipment.

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The gain (loss) is the pre-tax difference between the net condemnation award and the entity's adjusted basis of the condemned property.

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