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Long-Term Debt (Detail) - USD ($)
9 Months Ended
Mar. 30, 2019
Jun. 30, 2018
Dec. 28, 2016
Aug. 06, 2015
Sep. 03, 2014
Debt Disclosure [Line Items]          
Line of Credit Facility, Amount Outstanding $ 18,100,000 $ 16,200,000      
Letters of Credit Outstanding, Amount 400,000 400,000      
Additional availability of line of credit 26,500,000 28,400,000      
Debt Instrument, Periodic Payment, Principal 1,250,000        
2019 (1) 1,468,000        
2020 5,871,000        
2021 5,871,000        
2022 1,250,000        
2023 0        
Thereafter 18,125,000        
Total debt 32,585,000        
Unamortized debt issuance costs (67,000)        
Long-term debt, net of debt issuance costs $ 32,518,000 16,300,000     $ 35,000,000
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 $ 12,500,000        
Equipment Term Loan          
Debt Disclosure [Line Items]          
Debt Instrument, Periodic Payment, Principal 200,000        
Debt Instrument, Unused Borrowing Capacity, Amount 2,100,000        
Long-term debt, net of debt issuance costs $ 2,000,000 $ 2,600,000 $ 3,900,000    
Wells Fargo Bank          
Debt Disclosure [Line Items]          
Increase in revolving line of credit       $ 45,000,000.0  
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 4.49063% 4.09%      
Maximum          
Debt Disclosure [Line Items]          
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate 5.50% 5.00%