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Borrowings - Narrative (Details) - USD ($)
3 Months Ended 12 Months Ended
May 09, 2018
Jul. 03, 2018
Jan. 01, 2019
Jan. 02, 2018
Jan. 03, 2017
Jun. 28, 2022
Mar. 30, 2021
Mar. 31, 2020
Apr. 02, 2019
Debt Instrument [Line Items]                  
Unamortized debt issuance costs     $ 1,700,000            
Amount outstanding     46,600,000            
Letters of credit outstanding     3,700,000            
Repayments of debt     719,000            
Repayments of principal in year two     1,313,000            
Repayments of principal in year three     1,969,000            
Repayments of principal in year four     42,575,000            
Interest Expense     4,305,000 $ 3,839,000 $ 2,916,000        
Loss on extinguishment of debt     626,000 0 0        
Amortization of Debt Issuance Costs     $ 607,000 $ 465,000 $ 140,000        
Minimum                  
Debt Instrument [Line Items]                  
Interest rate during period     4.95%            
Maximum                  
Debt Instrument [Line Items]                  
Interest rate during period     7.25%            
Two Thousand and Eighteen Credit Facility | Minimum                  
Debt Instrument [Line Items]                  
Commitment fee percentage 0.30%                
Two Thousand and Eighteen Credit Facility | Maximum                  
Debt Instrument [Line Items]                  
Commitment fee percentage 0.50%                
Two Thousand and Eighteen Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum                  
Debt Instrument [Line Items]                  
Basis spread on variable rate 2.25%                
Two Thousand and Eighteen Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum                  
Debt Instrument [Line Items]                  
Basis spread on variable rate 3.25%                
Two Thousand and Eighteen Credit Facility | Base Rate | Minimum                  
Debt Instrument [Line Items]                  
Basis spread on variable rate 1.25%                
Two Thousand and Eighteen Credit Facility | Base Rate | Maximum                  
Debt Instrument [Line Items]                  
Basis spread on variable rate 2.25%                
Two Thousand and Eighteen Credit Facility | Federal Funds Rate                  
Debt Instrument [Line Items]                  
Basis spread on variable rate 0.50%                
Two Thousand and Eighteen Credit Facility | Prime Rate                  
Debt Instrument [Line Items]                  
Basis spread on variable rate 1.00%                
Two Thousand and Eighteen Credit Subfacility                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity $ 15,000,000.0                
Two Thousand and Eighteen Swingline Subfacility                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity $ 10,000,000.0                
Debt instrument, term 4 years                
Revolving Credit Facility | Two Thousand and Eighteen Term Loan Facility                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity $ 25,000,000.0                
Revolving Credit Facility | Two Thousand and Eighteen Credit Facility                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity 65,000,000.0                
Letter of Credit | Two Thousand and Eighteen Credit Facility                  
Debt Instrument [Line Items]                  
Additional borrowing capacity $ 75,000,000.0                
Letter of Credit | Prior Credit Facility                  
Debt Instrument [Line Items]                  
Loss on extinguishment of debt   $ 600,000              
Scenario, Forecast                  
Debt Instrument [Line Items]                  
Repayments of debt                 $ 156,250
Repayments of principal in year two               $ 187,500  
Repayments of principal in year three             $ 375,000    
Repayments of principal in year four           $ 531,250