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Summary of Significant Accounting Policies - Additional Information (Detail)
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 20, 2020
Oct. 03, 2021
USD ($)
Sep. 27, 2020
USD ($)
Oct. 03, 2021
USD ($)
Sep. 27, 2020
USD ($)
Jan. 03, 2021
USD ($)
Supplier
Accounting Policies [Line Items]            
Reporting period, minimum       364 days    
Reporting period, maximum       371 days    
Concentration risk, suppliers | Supplier           680
Concentration risk, largest supplier | Supplier           20
Suppliers accounted for total purchases           36.40%
Vendor represented greater than of total purchases | Supplier           1
Number of performance obligation       one    
Stored value card redemption revenue recognized   $ 1,300,000 $ 1,300,000 $ 4,500,000 $ 3,900,000  
Outstanding stored value card liabilities   6,900,000   $ 6,900,000   $ 7,500,000
Stored value cards redeemed period       2 years    
Impairment charges       $ 0 0  
Merchandise [Member] | Accounting Standards Update 2014-09 | ASC 606 [Member]            
Accounting Policies [Line Items]            
Estimated right of return related to estimated sales returns       800,000   1,200,000
Allowance for sales returns reserve   1,600,000   1,600,000   $ 2,400,000
Stored Value Card Breakage Revenue [Member]            
Accounting Policies [Line Items]            
Recognized stored value card breakage revenue   100,000 $ 100,000 200,000 $ 200,000  
Nike [Member]            
Accounting Policies [Line Items]            
Suppliers accounted for total purchases           8.50%
Percentage of vendors represented greater than of total purchases           5.00%
Suppliers accounted for total sales           7.20%
COVID-19 [Member]            
Accounting Policies [Line Items]            
Percentage of minimum number of retail store locations closed 50.00%          
Deferred, lease liability   $ 200,000   $ 200,000   $ 600,000
COVID-19 [Member] | California [Member]            
Accounting Policies [Line Items]            
Percentage of stores       52.00%    
First Quarter [Member]            
Accounting Policies [Line Items]            
Interim reporting periods       91 days   91 days
Second Quarter [Member]            
Accounting Policies [Line Items]            
Interim reporting periods       91 days   91 days
Third Quarter [Member]            
Accounting Policies [Line Items]            
Interim reporting periods       91 days   91 days
Fourth Quarter [Member]            
Accounting Policies [Line Items]            
Interim reporting periods       91 days   98 days