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Long-Term Debt (Detail) - USD ($)
3 Months Ended 9 Months Ended
Apr. 02, 2022
Mar. 28, 2020
Mar. 05, 2020
Nov. 20, 2019
Sep. 05, 2019
Jun. 29, 2019
Sep. 30, 2018
Dec. 28, 2016
Debt Disclosure [Line Items]                
Debt Instrument, Periodic Payment, Principal   $ 1,670,000            
Line of Credit Facility, Amount Outstanding   57,200,000       $ 23,400,000    
Letters of Credit Outstanding, Amount   400,000       400,000    
Additional availability of line of credit   7,400,000       21,300,000    
2020 (1)   1,884,000            
2021   7,537,000            
2022   2,917,000            
2023   417,000            
2024   57,236,000            
Total debt   69,991,000            
Unamortized debt issuance costs   (37,000)            
Long-term debt, net of debt issuance costs   $ 69,954,000     $ 5,000,000.0 11,300,000 $ 35,000,000.0  
Line of Credit | One-Month London Interbank Offered Rate                
Debt Disclosure [Line Items]                
Variable rate on line of credit facility (percent)   1.50%            
Line of Credit | Federal Funds Rate                
Debt Disclosure [Line Items]                
Variable rate on line of credit facility (percent)   1.50%            
Term Loan                
Debt Disclosure [Line Items]                
Long-term debt, net of debt issuance costs   $ 11,700,000            
Equipment Term Loan                
Debt Disclosure [Line Items]                
Debt Instrument, Periodic Payment, Principal   200,000            
Long-term debt, net of debt issuance costs   $ 1,100,000       $ 1,700,000   $ 3,900,000
Wells Fargo Bank                
Debt Disclosure [Line Items]                
Increase in revolving line of credit     $ 65,000,000.0 $ 55,000,000.0        
Debt Instrument, Basis Spread on Variable Rate, 1.75% | Line of Credit | Fixed Rate                
Debt Disclosure [Line Items]                
Variable rate on line of credit facility (percent)   1.75%            
Debt Instrument, Basis Spread on Variable Rate, 2.00% | Line of Credit | Fixed Rate                
Debt Disclosure [Line Items]                
Variable rate on line of credit facility (percent)   2.00%            
Debt Instrument, Basis Spread on Variable Rate, 2.25% | Line of Credit | Fixed Rate                
Debt Disclosure [Line Items]                
Variable rate on line of credit facility (percent)   2.25%            
Minimum                
Debt Disclosure [Line Items]                
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate   2.99%       4.40%    
Maximum                
Debt Disclosure [Line Items]                
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate   3.58%       5.50%    
Subsequent Event [Member]                
Debt Disclosure [Line Items]                
Debt Instrument, Periodic Payment, Principal $ 400,000